Parallelize builder configs creation

Show benchmarks

PyArrow==8.0.0

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.005905 / 0.011353 (-0.005448) | 0.003623 / 0.011008 (-0.007385) | 0.079616 / 0.038508 (0.041108) | 0.059840 / 0.023109 (0.036730) | 0.392281 / 0.275898 (0.116383) | 0.434539 / 0.323480 (0.111059) | 0.004746 / 0.007986 (-0.003239) | 0.002935 / 0.004328 (-0.001394) | 0.062907 / 0.004250 (0.058657) | 0.048233 / 0.037052 (0.011181) | 0.394170 / 0.258489 (0.135681) | 0.427430 / 0.293841 (0.133589) | 0.027382 / 0.128546 (-0.101164) | 0.007890 / 0.075646 (-0.067756) | 0.259681 / 0.419271 (-0.159591) | 0.044085 / 0.043533 (0.000552) | 0.388640 / 0.255139 (0.133501) | 0.412665 / 0.283200 (0.129465) | 0.021256 / 0.141683 (-0.120427) | 1.485672 / 1.452155 (0.033518) | 1.531410 / 1.492716 (0.038694) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.220346 / 0.018006 (0.202340) | 0.425329 / 0.000490 (0.424840) | 0.006224 / 0.000200 (0.006024) | 0.000208 / 0.000054 (0.000153) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.024864 / 0.037411 (-0.012547) | 0.072925 / 0.014526 (0.058399) | 0.083711 / 0.176557 (-0.092845) | 0.144213 / 0.737135 (-0.592923) | 0.084201 / 0.296338 (-0.212137) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.399467 / 0.215209 (0.184258) | 3.978979 / 2.077655 (1.901325) | 1.916994 / 1.504120 (0.412874) | 1.753098 / 1.541195 (0.211903) | 1.809866 / 1.468490 (0.341376) | 0.506806 / 4.584777 (-4.077971) | 3.051044 / 3.745712 (-0.694668) | 2.857624 / 5.269862 (-2.412237) | 1.872033 / 4.565676 (-2.693644) | 0.058543 / 0.424275 (-0.365732) | 0.006569 / 0.007607 (-0.001038) | 0.472630 / 0.226044 (0.246586) | 4.724862 / 2.268929 (2.455934) | 2.413068 / 55.444624 (-53.031556) | 2.046910 / 6.876477 (-4.829567) | 2.190455 / 2.142072 (0.048383) | 0.595228 / 4.805227 (-4.210000) | 0.125942 / 6.500664 (-6.374722) | 0.059474 / 0.075469 (-0.015995) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.235927 / 1.841788 (-0.605861) | 17.367803 / 8.074308 (9.293495) | 13.550362 / 10.191392 (3.358970) | 0.131664 / 0.680424 (-0.548760) | 0.016331 / 0.534201 (-0.517870) | 0.331295 / 0.579283 (-0.247988) | 0.367641 / 0.434364 (-0.066723) | 0.382595 / 0.540337 (-0.157742) | 0.540361 / 1.386936 (-0.846575) |

PyArrow==latest

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006120 / 0.011353 (-0.005233) | 0.003691 / 0.011008 (-0.007318) | 0.062768 / 0.038508 (0.024259) | 0.058045 / 0.023109 (0.034936) | 0.443616 / 0.275898 (0.167718) | 0.473854 / 0.323480 (0.150374) | 0.004710 / 0.007986 (-0.003275) | 0.002915 / 0.004328 (-0.001414) | 0.062922 / 0.004250 (0.058672) | 0.048557 / 0.037052 (0.011505) | 0.446136 / 0.258489 (0.187647) | 0.479235 / 0.293841 (0.185394) | 0.028704 / 0.128546 (-0.099842) | 0.008170 / 0.075646 (-0.067477) | 0.068853 / 0.419271 (-0.350419) | 0.041393 / 0.043533 (-0.002140) | 0.444683 / 0.255139 (0.189544) | 0.466607 / 0.283200 (0.183407) | 0.020890 / 0.141683 (-0.120793) | 1.473745 / 1.452155 (0.021590) | 1.498772 / 1.492716 (0.006055) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.216875 / 0.018006 (0.198868) | 0.411700 / 0.000490 (0.411211) | 0.003337 / 0.000200 (0.003137) | 0.000079 / 0.000054 (0.000024) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.027054 / 0.037411 (-0.010357) | 0.080617 / 0.014526 (0.066092) | 0.091052 / 0.176557 (-0.085505) | 0.144126 / 0.737135 (-0.593009) | 0.090123 / 0.296338 (-0.206216) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.461132 / 0.215209 (0.245922) | 4.598662 / 2.077655 (2.521008) | 2.539213 / 1.504120 (1.035093) | 2.362782 / 1.541195 (0.821587) | 2.428648 / 1.468490 (0.960157) | 0.506305 / 4.584777 (-4.078472) | 3.091132 / 3.745712 (-0.654581) | 2.884870 / 5.269862 (-2.384992) | 1.880806 / 4.565676 (-2.684870) | 0.058727 / 0.424275 (-0.365548) | 0.006452 / 0.007607 (-0.001155) | 0.533519 / 0.226044 (0.307474) | 5.346406 / 2.268929 (3.077478) | 2.987920 / 55.444624 (-52.456704) | 2.667591 / 6.876477 (-4.208885) | 2.848696 / 2.142072 (0.706623) | 0.601018 / 4.805227 (-4.204209) | 0.124929 / 6.500664 (-6.375735) | 0.061583 / 0.075469 (-0.013886) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.356825 / 1.841788 (-0.484962) | 17.964503 / 8.074308 (9.890195) | 14.691471 / 10.191392 (4.500079) | 0.132525 / 0.680424 (-0.547899) | 0.018061 / 0.534201 (-0.516140) | 0.335459 / 0.579283 (-0.243824) | 0.378260 / 0.434364 (-0.056104) | 0.390681 / 0.540337 (-0.149657) | 0.547030 / 1.386936 (-0.839906) |

![](https://cml.dev/watermark.png#8c55213a6c5fcff9b3dacce491caa68eacebe10d "CML watermark")

Show benchmarks

PyArrow==8.0.0

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006624 / 0.011353 (-0.004729) | 0.004039 / 0.011008 (-0.006970) | 0.085862 / 0.038508 (0.047354) | 0.077183 / 0.023109 (0.054074) | 0.319132 / 0.275898 (0.043234) | 0.350818 / 0.323480 (0.027338) | 0.004122 / 0.007986 (-0.003864) | 0.003395 / 0.004328 (-0.000934) | 0.065237 / 0.004250 (0.060987) | 0.056675 / 0.037052 (0.019623) | 0.321040 / 0.258489 (0.062551) | 0.362011 / 0.293841 (0.068170) | 0.030988 / 0.128546 (-0.097559) | 0.008623 / 0.075646 (-0.067023) | 0.289433 / 0.419271 (-0.129839) | 0.052755 / 0.043533 (0.009222) | 0.323291 / 0.255139 (0.068152) | 0.340110 / 0.283200 (0.056911) | 0.026299 / 0.141683 (-0.115383) | 1.509405 / 1.452155 (0.057250) | 1.559993 / 1.492716 (0.067277) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.233285 / 0.018006 (0.215279) | 0.451633 / 0.000490 (0.451143) | 0.009954 / 0.000200 (0.009754) | 0.000098 / 0.000054 (0.000043) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.029623 / 0.037411 (-0.007788) | 0.083942 / 0.014526 (0.069416) | 0.097378 / 0.176557 (-0.079178) | 0.152630 / 0.737135 (-0.584506) | 0.098379 / 0.296338 (-0.197959) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.386237 / 0.215209 (0.171028) | 3.850805 / 2.077655 (1.773150) | 1.896032 / 1.504120 (0.391912) | 1.729746 / 1.541195 (0.188551) | 1.867831 / 1.468490 (0.399341) | 0.481496 / 4.584777 (-4.103281) | 3.564432 / 3.745712 (-0.181280) | 3.336084 / 5.269862 (-1.933777) | 2.040944 / 4.565676 (-2.524732) | 0.057247 / 0.424275 (-0.367028) | 0.007275 / 0.007607 (-0.000332) | 0.464600 / 0.226044 (0.238556) | 4.648562 / 2.268929 (2.379634) | 2.394430 / 55.444624 (-53.050195) | 2.029748 / 6.876477 (-4.846728) | 2.280975 / 2.142072 (0.138902) | 0.619073 / 4.805227 (-4.186154) | 0.150504 / 6.500664 (-6.350160) | 0.061206 / 0.075469 (-0.014263) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.267309 / 1.841788 (-0.574479) | 19.062725 / 8.074308 (10.988417) | 14.192565 / 10.191392 (4.001173) | 0.162908 / 0.680424 (-0.517515) | 0.018445 / 0.534201 (-0.515756) | 0.392110 / 0.579283 (-0.187173) | 0.415340 / 0.434364 (-0.019024) | 0.456783 / 0.540337 (-0.083554) | 0.653019 / 1.386936 (-0.733917) |

PyArrow==latest

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006995 / 0.011353 (-0.004358) | 0.004027 / 0.011008 (-0.006981) | 0.064124 / 0.038508 (0.025616) | 0.076004 / 0.023109 (0.052895) | 0.401760 / 0.275898 (0.125862) | 0.432339 / 0.323480 (0.108859) | 0.005471 / 0.007986 (-0.002515) | 0.003335 / 0.004328 (-0.000993) | 0.064164 / 0.004250 (0.059913) | 0.058101 / 0.037052 (0.021048) | 0.401698 / 0.258489 (0.143209) | 0.436033 / 0.293841 (0.142192) | 0.032789 / 0.128546 (-0.095757) | 0.008482 / 0.075646 (-0.067165) | 0.070707 / 0.419271 (-0.348565) | 0.048287 / 0.043533 (0.004755) | 0.395501 / 0.255139 (0.140362) | 0.419385 / 0.283200 (0.136186) | 0.024043 / 0.141683 (-0.117640) | 1.503310 / 1.452155 (0.051156) | 1.562160 / 1.492716 (0.069444) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.227629 / 0.018006 (0.209623) | 0.457306 / 0.000490 (0.456816) | 0.005835 / 0.000200 (0.005635) | 0.000109 / 0.000054 (0.000054) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.032991 / 0.037411 (-0.004420) | 0.093265 / 0.014526 (0.078739) | 0.106595 / 0.176557 (-0.069961) | 0.158557 / 0.737135 (-0.578578) | 0.106805 / 0.296338 (-0.189533) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.436573 / 0.215209 (0.221364) | 4.355777 / 2.077655 (2.278122) | 2.323151 / 1.504120 (0.819031) | 2.164101 / 1.541195 (0.622906) | 2.252808 / 1.468490 (0.784318) | 0.494902 / 4.584777 (-4.089875) | 3.615073 / 3.745712 (-0.130639) | 3.329738 / 5.269862 (-1.940124) | 2.059137 / 4.565676 (-2.506539) | 0.058384 / 0.424275 (-0.365891) | 0.007330 / 0.007607 (-0.000277) | 0.512326 / 0.226044 (0.286281) | 5.125652 / 2.268929 (2.856724) | 2.861981 / 55.444624 (-52.582644) | 2.500172 / 6.876477 (-4.376305) | 2.715862 / 2.142072 (0.573789) | 0.597299 / 4.805227 (-4.207928) | 0.134346 / 6.500664 (-6.366318) | 0.060396 / 0.075469 (-0.015074) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.353771 / 1.841788 (-0.488017) | 19.334801 / 8.074308 (11.260493) | 14.669875 / 10.191392 (4.478483) | 0.167607 / 0.680424 (-0.512817) | 0.019839 / 0.534201 (-0.514362) | 0.395473 / 0.579283 (-0.183810) | 0.419822 / 0.434364 (-0.014542) | 0.471400 / 0.540337 (-0.068938) | 0.648297 / 1.386936 (-0.738639) |

![](https://cml.dev/watermark.png#d5a112e7f1ce1635725773d911c825adca7bcfe0 "CML watermark")

@mariosasko let me know what you think or if you have better ideas to make it faster

Yea lazy data files resolution seems a better approach actually

For datasets with lots of configs defined in YAML

E.g. `load_dataset("uonlp/CulturaX", "fr", revision="refs/pr/6")` from >1min to 15sec


Dataset.from_generator() cost much more time in vscode debugging mode then running mode

Answered on the forum: https://discuss.huggingface.co/t/dataset-from-generator-cost-much-more-time-in-vscode-debugging-mode-then-running-mode/56005/2

### Describe the bug

Hey there,
I’m using Dataset.from_generator() to convert a torch_dataset to the Huggingface Dataset.
However, when I debug my code on vscode, I find that it runs really slow on Dataset.from_generator() which may even 20 times longer then run the script on terminal.

### Steps to reproduce the bug

I write a simple test code :

```python
import os
from functools import partial
from typing import Callable

import torch
import time
from torch.utils.data import Dataset as TorchDataset

from datasets import load_from_disk, Dataset as HFDataset

import torch
from torch.utils.data import Dataset

class SimpleDataset(Dataset):
    def __init__(self, data):
        self.data = data
        self.keys = list(data[0].keys())

    def __len__(self):
        return len(self.data)

    def __getitem__(self, index):
        sample = self.data[index]
        return {key: sample[key] for key in self.keys}

def TorchDataset2HuggingfaceDataset(torch_dataset: TorchDataset, cache_dir: str = None
) -> HFDataset:

    """
        convert torch dataset to huggingface dataset
    """
    generator : Callable[[], TorchDataset] = lambda: (sample for sample in torch_dataset)

    return HFDataset.from_generator(generator, cache_dir=cache_dir)

if __name__ == '__main__':
    data = [
        {'id': 1, 'name': 'Alice'},
        {'id': 2, 'name': 'Bob'},
        {'id': 3, 'name': 'Charlie'}
    ]

    torch_dataset = SimpleDataset(data)
    start_time = time.time()
    huggingface_dataset = TorchDataset2HuggingfaceDataset(torch_dataset)
    end_time = time.time()
    print("time: ", end_time - start_time)
    print(huggingface_dataset)
```

### Expected behavior

this test on my machine report that the running time on terminal is 0.086,
however the running time in debugging mode on vscode is 0.25, which I think is much longer than expected.

I’d like to know is the anything wrong in the code or just because of debugging?
I have traced the code and I find is this func which I get stuck.

```python
def create_config_id(
        self,
        config_kwargs: dict,
        custom_features: Optional[Features] = None,
    ) -> str:
...
# stuck in this line
suffix = Hasher.hash(config_kwargs_to_add_to_suffix)
```

### Environment info

- `datasets` version: 2.12.0
- Platform: Linux-5.11.0-27-generic-x86_64-with-glibc2.31
- Python version: 3.11.3
- Huggingface_hub version: 0.17.2
- PyArrow version: 11.0.0
- Pandas version: 2.0.1


Check builder cls default config name in inspect

_The documentation is not available anymore as the PR was closed or merged._

Show benchmarks

PyArrow==8.0.0

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006591 / 0.011353 (-0.004762) | 0.003991 / 0.011008 (-0.007017) | 0.085197 / 0.038508 (0.046689) | 0.080312 / 0.023109 (0.057202) | 0.342026 / 0.275898 (0.066128) | 0.370749 / 0.323480 (0.047269) | 0.004124 / 0.007986 (-0.003861) | 0.003413 / 0.004328 (-0.000916) | 0.064363 / 0.004250 (0.060113) | 0.055920 / 0.037052 (0.018868) | 0.340667 / 0.258489 (0.082178) | 0.380138 / 0.293841 (0.086297) | 0.031115 / 0.128546 (-0.097431) | 0.008511 / 0.075646 (-0.067135) | 0.289065 / 0.419271 (-0.130207) | 0.052266 / 0.043533 (0.008734) | 0.343808 / 0.255139 (0.088669) | 0.353578 / 0.283200 (0.070378) | 0.024006 / 0.141683 (-0.117676) | 1.490322 / 1.452155 (0.038168) | 1.591133 / 1.492716 (0.098417) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.234718 / 0.018006 (0.216712) | 0.447023 / 0.000490 (0.446533) | 0.009343 / 0.000200 (0.009143) | 0.000259 / 0.000054 (0.000204) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.030466 / 0.037411 (-0.006945) | 0.083367 / 0.014526 (0.068841) | 0.100532 / 0.176557 (-0.076024) | 0.158018 / 0.737135 (-0.579117) | 0.098280 / 0.296338 (-0.198059) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.408501 / 0.215209 (0.193292) | 4.066937 / 2.077655 (1.989282) | 2.034029 / 1.504120 (0.529909) | 1.842982 / 1.541195 (0.301788) | 1.987319 / 1.468490 (0.518829) | 0.492126 / 4.584777 (-4.092651) | 3.554027 / 3.745712 (-0.191685) | 3.289023 / 5.269862 (-1.980839) | 2.069796 / 4.565676 (-2.495880) | 0.057930 / 0.424275 (-0.366346) | 0.007308 / 0.007607 (-0.000299) | 0.482596 / 0.226044 (0.256552) | 4.830714 / 2.268929 (2.561785) | 2.506787 / 55.444624 (-52.937838) | 2.163498 / 6.876477 (-4.712979) | 2.389135 / 2.142072 (0.247062) | 0.597538 / 4.805227 (-4.207689) | 0.134268 / 6.500664 (-6.366396) | 0.061189 / 0.075469 (-0.014280) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.245328 / 1.841788 (-0.596460) | 19.145151 / 8.074308 (11.070843) | 14.742121 / 10.191392 (4.550729) | 0.144749 / 0.680424 (-0.535675) | 0.018433 / 0.534201 (-0.515768) | 0.391867 / 0.579283 (-0.187416) | 0.416555 / 0.434364 (-0.017809) | 0.454341 / 0.540337 (-0.085997) | 0.646833 / 1.386936 (-0.740103) |

PyArrow==latest

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006669 / 0.011353 (-0.004684) | 0.004031 / 0.011008 (-0.006978) | 0.064347 / 0.038508 (0.025839) | 0.076857 / 0.023109 (0.053748) | 0.415864 / 0.275898 (0.139966) | 0.468615 / 0.323480 (0.145135) | 0.005383 / 0.007986 (-0.002603) | 0.003314 / 0.004328 (-0.001015) | 0.064829 / 0.004250 (0.060578) | 0.057182 / 0.037052 (0.020129) | 0.417055 / 0.258489 (0.158566) | 0.472725 / 0.293841 (0.178884) | 0.031938 / 0.128546 (-0.096608) | 0.008564 / 0.075646 (-0.067082) | 0.070649 / 0.419271 (-0.348623) | 0.047439 / 0.043533 (0.003906) | 0.409589 / 0.255139 (0.154450) | 0.433700 / 0.283200 (0.150500) | 0.024132 / 0.141683 (-0.117551) | 1.500825 / 1.452155 (0.048670) | 1.592059 / 1.492716 (0.099343) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.225652 / 0.018006 (0.207646) | 0.444188 / 0.000490 (0.443698) | 0.004581 / 0.000200 (0.004381) | 0.000104 / 0.000054 (0.000050) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.033272 / 0.037411 (-0.004139) | 0.096833 / 0.014526 (0.082307) | 0.107134 / 0.176557 (-0.069422) | 0.159299 / 0.737135 (-0.577836) | 0.107533 / 0.296338 (-0.188806) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.429100 / 0.215209 (0.213890) | 4.281051 / 2.077655 (2.203396) | 2.318713 / 1.504120 (0.814593) | 2.165645 / 1.541195 (0.624451) | 2.250224 / 1.468490 (0.781734) | 0.495791 / 4.584777 (-4.088986) | 3.591953 / 3.745712 (-0.153760) | 3.303426 / 5.269862 (-1.966436) | 2.076861 / 4.565676 (-2.488816) | 0.058369 / 0.424275 (-0.365906) | 0.007387 / 0.007607 (-0.000220) | 0.501270 / 0.226044 (0.275225) | 5.014987 / 2.268929 (2.746059) | 2.800951 / 55.444624 (-52.643673) | 2.464316 / 6.876477 (-4.412161) | 2.685259 / 2.142072 (0.543187) | 0.584797 / 4.805227 (-4.220430) | 0.131889 / 6.500664 (-6.368775) | 0.061021 / 0.075469 (-0.014448) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.366982 / 1.841788 (-0.474806) | 19.820376 / 8.074308 (11.746068) | 14.968664 / 10.191392 (4.777272) | 0.165344 / 0.680424 (-0.515080) | 0.019956 / 0.534201 (-0.514245) | 0.395843 / 0.579283 (-0.183441) | 0.420854 / 0.434364 (-0.013510) | 0.465065 / 0.540337 (-0.075272) | 0.651531 / 1.386936 (-0.735405) |

![](https://cml.dev/watermark.png#980ca0e13300f5392cd87189d5afd5942927afc7 "CML watermark")

Show benchmarks

PyArrow==8.0.0

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.005974 / 0.011353 (-0.005379) | 0.003714 / 0.011008 (-0.007294) | 0.080049 / 0.038508 (0.041541) | 0.061233 / 0.023109 (0.038124) | 0.317187 / 0.275898 (0.041289) | 0.352725 / 0.323480 (0.029245) | 0.004867 / 0.007986 (-0.003119) | 0.002953 / 0.004328 (-0.001376) | 0.063156 / 0.004250 (0.058905) | 0.046752 / 0.037052 (0.009700) | 0.320171 / 0.258489 (0.061682) | 0.367572 / 0.293841 (0.073731) | 0.027253 / 0.128546 (-0.101293) | 0.008100 / 0.075646 (-0.067546) | 0.261206 / 0.419271 (-0.158066) | 0.044581 / 0.043533 (0.001048) | 0.331169 / 0.255139 (0.076030) | 0.348719 / 0.283200 (0.065519) | 0.021397 / 0.141683 (-0.120286) | 1.528315 / 1.452155 (0.076160) | 1.533789 / 1.492716 (0.041073) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.233336 / 0.018006 (0.215329) | 0.416866 / 0.000490 (0.416376) | 0.008805 / 0.000200 (0.008605) | 0.000240 / 0.000054 (0.000186) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.024754 / 0.037411 (-0.012657) | 0.073311 / 0.014526 (0.058785) | 0.085419 / 0.176557 (-0.091138) | 0.146380 / 0.737135 (-0.590756) | 0.085545 / 0.296338 (-0.210793) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.431426 / 0.215209 (0.216217) | 4.315899 / 2.077655 (2.238244) | 2.232492 / 1.504120 (0.728372) | 2.064174 / 1.541195 (0.522979) | 2.158982 / 1.468490 (0.690492) | 0.499375 / 4.584777 (-4.085402) | 3.093259 / 3.745712 (-0.652454) | 2.848260 / 5.269862 (-2.421601) | 1.853097 / 4.565676 (-2.712579) | 0.057143 / 0.424275 (-0.367132) | 0.006349 / 0.007607 (-0.001258) | 0.507747 / 0.226044 (0.281702) | 5.078872 / 2.268929 (2.809944) | 2.717697 / 55.444624 (-52.726927) | 2.363564 / 6.876477 (-4.512913) | 2.485756 / 2.142072 (0.343684) | 0.595888 / 4.805227 (-4.209340) | 0.127285 / 6.500664 (-6.373379) | 0.060639 / 0.075469 (-0.014830) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.219287 / 1.841788 (-0.622501) | 17.300038 / 8.074308 (9.225730) | 13.747230 / 10.191392 (3.555838) | 0.144841 / 0.680424 (-0.535583) | 0.016587 / 0.534201 (-0.517614) | 0.336891 / 0.579283 (-0.242392) | 0.376128 / 0.434364 (-0.058236) | 0.385749 / 0.540337 (-0.154588) | 0.552218 / 1.386936 (-0.834718) |

PyArrow==latest

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006477 / 0.011353 (-0.004876) | 0.003709 / 0.011008 (-0.007299) | 0.064708 / 0.038508 (0.026200) | 0.062627 / 0.023109 (0.039518) | 0.444721 / 0.275898 (0.168823) | 0.477825 / 0.323480 (0.154345) | 0.004890 / 0.007986 (-0.003096) | 0.002896 / 0.004328 (-0.001432) | 0.063781 / 0.004250 (0.059530) | 0.050488 / 0.037052 (0.013436) | 0.453466 / 0.258489 (0.194977) | 0.483303 / 0.293841 (0.189462) | 0.028814 / 0.128546 (-0.099732) | 0.008207 / 0.075646 (-0.067440) | 0.070140 / 0.419271 (-0.349131) | 0.041487 / 0.043533 (-0.002045) | 0.454599 / 0.255139 (0.199460) | 0.468374 / 0.283200 (0.185174) | 0.019758 / 0.141683 (-0.121925) | 1.437542 / 1.452155 (-0.014613) | 1.507965 / 1.492716 (0.015249) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.223358 / 0.018006 (0.205352) | 0.413824 / 0.000490 (0.413334) | 0.004593 / 0.000200 (0.004393) | 0.000089 / 0.000054 (0.000035) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.026278 / 0.037411 (-0.011134) | 0.081992 / 0.014526 (0.067466) | 0.089969 / 0.176557 (-0.086587) | 0.143668 / 0.737135 (-0.593467) | 0.091273 / 0.296338 (-0.205066) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.461198 / 0.215209 (0.245989) | 4.615398 / 2.077655 (2.537743) | 2.552291 / 1.504120 (1.048171) | 2.373789 / 1.541195 (0.832595) | 2.431591 / 1.468490 (0.963101) | 0.507683 / 4.584777 (-4.077094) | 3.148771 / 3.745712 (-0.596941) | 2.849118 / 5.269862 (-2.420744) | 1.883001 / 4.565676 (-2.682675) | 0.059423 / 0.424275 (-0.364852) | 0.006463 / 0.007607 (-0.001144) | 0.535129 / 0.226044 (0.309085) | 5.362870 / 2.268929 (3.093941) | 3.016548 / 55.444624 (-52.428076) | 2.666205 / 6.876477 (-4.210271) | 2.821396 / 2.142072 (0.679324) | 0.606596 / 4.805227 (-4.198631) | 0.125991 / 6.500664 (-6.374673) | 0.063566 / 0.075469 (-0.011903) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.364771 / 1.841788 (-0.477017) | 18.000713 / 8.074308 (9.926404) | 14.840330 / 10.191392 (4.648937) | 0.144770 / 0.680424 (-0.535653) | 0.018060 / 0.534201 (-0.516141) | 0.334470 / 0.579283 (-0.244813) | 0.387386 / 0.434364 (-0.046978) | 0.398743 / 0.540337 (-0.141595) | 0.555437 / 1.386936 (-0.831499) |

![](https://cml.dev/watermark.png#5b974c9af6b45b6ebdbbf4b3418f25506c1c0618 "CML watermark")

Show benchmarks

PyArrow==8.0.0

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006491 / 0.011353 (-0.004862) | 0.004058 / 0.011008 (-0.006950) | 0.084462 / 0.038508 (0.045954) | 0.072310 / 0.023109 (0.049201) | 0.352458 / 0.275898 (0.076560) | 0.385829 / 0.323480 (0.062350) | 0.003978 / 0.007986 (-0.004007) | 0.003455 / 0.004328 (-0.000873) | 0.064070 / 0.004250 (0.059819) | 0.055577 / 0.037052 (0.018525) | 0.361288 / 0.258489 (0.102799) | 0.400147 / 0.293841 (0.106306) | 0.030785 / 0.128546 (-0.097761) | 0.008676 / 0.075646 (-0.066971) | 0.287481 / 0.419271 (-0.131791) | 0.052643 / 0.043533 (0.009110) | 0.354670 / 0.255139 (0.099531) | 0.382322 / 0.283200 (0.099122) | 0.025657 / 0.141683 (-0.116026) | 1.486798 / 1.452155 (0.034643) | 1.588439 / 1.492716 (0.095723) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.240881 / 0.018006 (0.222875) | 0.463997 / 0.000490 (0.463507) | 0.009688 / 0.000200 (0.009488) | 0.000601 / 0.000054 (0.000546) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.029071 / 0.037411 (-0.008340) | 0.083077 / 0.014526 (0.068551) | 0.119857 / 0.176557 (-0.056699) | 0.153387 / 0.737135 (-0.583749) | 0.132162 / 0.296338 (-0.164177) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.383822 / 0.215209 (0.168613) | 3.828572 / 2.077655 (1.750918) | 1.877629 / 1.504120 (0.373509) | 1.708757 / 1.541195 (0.167562) | 1.771658 / 1.468490 (0.303168) | 0.482439 / 4.584777 (-4.102338) | 3.496247 / 3.745712 (-0.249466) | 3.282055 / 5.269862 (-1.987807) | 2.053069 / 4.565676 (-2.512607) | 0.056626 / 0.424275 (-0.367649) | 0.007338 / 0.007607 (-0.000269) | 0.461257 / 0.226044 (0.235213) | 4.605326 / 2.268929 (2.336397) | 2.408365 / 55.444624 (-53.036260) | 1.986550 / 6.876477 (-4.889926) | 2.225220 / 2.142072 (0.083148) | 0.601301 / 4.805227 (-4.203927) | 0.132217 / 6.500664 (-6.368447) | 0.061217 / 0.075469 (-0.014252) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.268706 / 1.841788 (-0.573081) | 18.892026 / 8.074308 (10.817717) | 14.093892 / 10.191392 (3.902500) | 0.162483 / 0.680424 (-0.517941) | 0.018372 / 0.534201 (-0.515829) | 0.391901 / 0.579283 (-0.187382) | 0.401578 / 0.434364 (-0.032786) | 0.456741 / 0.540337 (-0.083596) | 0.646760 / 1.386936 (-0.740176) |

PyArrow==latest

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006657 / 0.011353 (-0.004696) | 0.003981 / 0.011008 (-0.007027) | 0.066126 / 0.038508 (0.027617) | 0.072673 / 0.023109 (0.049564) | 0.409970 / 0.275898 (0.134072) | 0.430797 / 0.323480 (0.107317) | 0.005477 / 0.007986 (-0.002508) | 0.003362 / 0.004328 (-0.000966) | 0.065532 / 0.004250 (0.061282) | 0.056018 / 0.037052 (0.018966) | 0.406676 / 0.258489 (0.148187) | 0.438516 / 0.293841 (0.144675) | 0.032795 / 0.128546 (-0.095751) | 0.008580 / 0.075646 (-0.067066) | 0.072692 / 0.419271 (-0.346579) | 0.048110 / 0.043533 (0.004577) | 0.396826 / 0.255139 (0.141687) | 0.418442 / 0.283200 (0.135242) | 0.023269 / 0.141683 (-0.118414) | 1.499438 / 1.452155 (0.047283) | 1.568842 / 1.492716 (0.076126) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.218729 / 0.018006 (0.200723) | 0.450771 / 0.000490 (0.450281) | 0.004996 / 0.000200 (0.004796) | 0.000086 / 0.000054 (0.000031) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.031484 / 0.037411 (-0.005928) | 0.092927 / 0.014526 (0.078401) | 0.107849 / 0.176557 (-0.068707) | 0.156658 / 0.737135 (-0.580478) | 0.106373 / 0.296338 (-0.189965) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.434658 / 0.215209 (0.219449) | 4.336386 / 2.077655 (2.258731) | 2.322577 / 1.504120 (0.818457) | 2.149505 / 1.541195 (0.608310) | 2.201967 / 1.468490 (0.733476) | 0.496994 / 4.584777 (-4.087783) | 3.533065 / 3.745712 (-0.212647) | 3.235750 / 5.269862 (-2.034112) | 2.034854 / 4.565676 (-2.530823) | 0.058258 / 0.424275 (-0.366017) | 0.007260 / 0.007607 (-0.000347) | 0.509115 / 0.226044 (0.283071) | 5.088427 / 2.268929 (2.819499) | 2.793551 / 55.444624 (-52.651073) | 2.430588 / 6.876477 (-4.445889) | 2.625998 / 2.142072 (0.483926) | 0.611676 / 4.805227 (-4.193552) | 0.133343 / 6.500664 (-6.367321) | 0.059888 / 0.075469 (-0.015581) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.377292 / 1.841788 (-0.464496) | 19.214299 / 8.074308 (11.139991) | 14.629146 / 10.191392 (4.437754) | 0.171283 / 0.680424 (-0.509141) | 0.020348 / 0.534201 (-0.513853) | 0.397823 / 0.579283 (-0.181461) | 0.411590 / 0.434364 (-0.022774) | 0.470850 / 0.540337 (-0.069487) | 0.658667 / 1.386936 (-0.728269) |

![](https://cml.dev/watermark.png#a1e1867e932f14233244fb25713f3c94c46ff50a "CML watermark")

Fix https://github.com/huggingface/datasets-server/issues/1812

this was causing this issue:

```ipython
In [1]: from datasets import *

In [2]: inspect.get_dataset_config_names("aakanksha/udpos")
Out[2]: ['default']

In [3]: load_dataset_builder("aakanksha/udpos").config.name
Out[3]: 'en'
```


exif_transpose not done to Image (PIL problem)

enhancement

New feature or request

Next major release

3.0

Indeed, it makes sense to do this by default.

In the meantime, you can use `.with_transform` to transpose the images when accessing them:

```python
import PIL.ImageOps

def exif_transpose_transform(batch):
  batch["image"] = [PIL.ImageOps.exif_transpose(image) for image in batch["image"]]
  return batch

dataset = dataset.with_transform(exif_transpose_transform)
```

This operation sets some `Image` attributes to `None` (`.format`, `.filename`, etc.), causing our tests to fail, so I think we should wait for Datasets 3.0 to make this change. In version 3.0, storing image paths will be replaced by embedding image bytes, so there will be fewer instances where we use the `.filename` attribute.

### Feature request

I noticed that some of my images loaded using PIL have some metadata related to exif that can rotate them when loading.
Since the dataset.features.Image uses PIL for loading, the loaded image may be rotated (width and height will be inverted) thus for tasks as object detection and layoutLM this can create some inconsistencies (between input bboxes and input images).

For now there is no option in datasets.features.Image to specify that. We need to do the following when preparing examples (when preparing images for training, test or inference):
```
from PIL import Image, ImageOps
pil = ImageOps.exif_transpose(pil)
```

reference: https://stackoverflow.com/a/63950647/5720150

Is it possible to add this by default to the datasets.feature.Image ? or to add the option to do the ImageOps.exif_transpose?

Thank you

### Motivation

Prevent having inverted data related to exif metadata that may affect object detection tasks

### Your contribution

Changing in datasets.featrues.Image I can help with that.


Support streaming datasets with pyarrow.parquet.read_table

This function reads an entire Arrow table in one go, which is not ideal memory-wise, so I don't think we should encourage using this function, considering we want to keep RAM usage as low as possible in the streaming mode.

(Note that Parquet files are compressed, meaning the loaded table can be significantly larger than the size in Parquet.)

Instead, we should suggest the authors to use:
```python
with open(doc_path, "rb") as f:
    parquet_file = pq.ParquetFile(f)
    for batch in parquet_file.iter_batches():
        pa_table = pa.Table.from_batches([batch])
        yield idx, pa_table
        idx += 1
```

@mariosasko I think the potential problem you evoke is independent of whether or not we support streaming mode:
- if the user's script with `read_table` works in non-streaming mode, it will also work in streaming mode after this PR

In fact, what we should suggest instead is to follow the scriptless approach, so that our `parquet` packaged module is used, with all the optimizations implemented. But this approach is not possible in all cases, and some use cases need to implement a script. And if they have small Parquet files and use `read_table`, I think we should support streaming.

In summary, let me clarify the goal and the scope of this PR:
- a user needs using a loading script
- their files are small enough so that they use `read_table`
- their loading script works in non-streaming mode
- therefore, this PR allows loading their dataset in streaming mode as well

Yes, the no-script approach with metadata configs makes the most sense.

> their files are small enough so that they use read_table

Some of the Parquet files in that repo are larger than 1 GB ...

Also, I'd wait for more instances of people using the `read_table` function on the Hub before merging this PR.

@mariosasko, yes, this solution is not specifically for the "uonlp/CulturaX" dataset, but for other use cases as I explained above: indeed, they finally removed the use of `read_table` because their data files are too large.

> Also, I'd wait for more instances of people using the `read_table` function on the Hub before merging this PR.

Do you know how many datasets are currently using `read_table`?

> Do you know how many datasets are currently using read_table?

Zero (based on the script that checks the script contents of the public Hub datasets).

@mariosasko thanks for pointing the script! :hugs:

However, I have found some Hub datasets that are using `read_table`, e.g.:
- https://huggingface.co/datasets/jglaser/protein_ligand_contacts
- https://huggingface.co/datasets/AresEkb/prof_standards_sbert_large_mt_nlu_ru
- https://huggingface.co/datasets/victorcosta/pt_legislation
- https://huggingface.co/datasets/jglaser/binding_affinity
- https://huggingface.co/datasets/jglaser/pdbbind_complexes
- https://huggingface.co/datasets/victorcosta/ria_pt__proems_format

I'm merging this PR as discussed in private.

Show benchmarks

PyArrow==8.0.0

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.008267 / 0.011353 (-0.003086) | 0.005813 / 0.011008 (-0.005195) | 0.108802 / 0.038508 (0.070294) | 0.093996 / 0.023109 (0.070886) | 0.403115 / 0.275898 (0.127217) | 0.457299 / 0.323480 (0.133819) | 0.006277 / 0.007986 (-0.001709) | 0.004701 / 0.004328 (0.000373) | 0.080700 / 0.004250 (0.076449) | 0.077906 / 0.037052 (0.040854) | 0.409972 / 0.258489 (0.151483) | 0.477707 / 0.293841 (0.183867) | 0.041816 / 0.128546 (-0.086731) | 0.011250 / 0.075646 (-0.064397) | 0.390634 / 0.419271 (-0.028637) | 0.065361 / 0.043533 (0.021828) | 0.404501 / 0.255139 (0.149362) | 0.448162 / 0.283200 (0.164962) | 0.032823 / 0.141683 (-0.108860) | 1.899892 / 1.452155 (0.447737) | 2.044561 / 1.492716 (0.551844) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.241093 / 0.018006 (0.223086) | 0.482111 / 0.000490 (0.481622) | 0.005505 / 0.000200 (0.005305) | 0.000094 / 0.000054 (0.000039) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.034861 / 0.037411 (-0.002551) | 0.109296 / 0.014526 (0.094770) | 0.127594 / 0.176557 (-0.048962) | 0.191815 / 0.737135 (-0.545320) | 0.122630 / 0.296338 (-0.173709) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.452194 / 0.215209 (0.236985) | 4.486200 / 2.077655 (2.408545) | 2.155635 / 1.504120 (0.651515) | 2.004569 / 1.541195 (0.463374) | 2.142570 / 1.468490 (0.674080) | 0.561488 / 4.584777 (-4.023289) | 4.381102 / 3.745712 (0.635390) | 3.914920 / 5.269862 (-1.354942) | 2.474271 / 4.565676 (-2.091406) | 0.067528 / 0.424275 (-0.356747) | 0.008723 / 0.007607 (0.001116) | 0.536077 / 0.226044 (0.310033) | 5.342050 / 2.268929 (3.073122) | 2.735747 / 55.444624 (-52.708877) | 2.353938 / 6.876477 (-4.522539) | 2.442878 / 2.142072 (0.300805) | 0.685404 / 4.805227 (-4.119823) | 0.156657 / 6.500664 (-6.344007) | 0.071714 / 0.075469 (-0.003755) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.562852 / 1.841788 (-0.278935) | 24.538203 / 8.074308 (16.463895) | 16.857777 / 10.191392 (6.666385) | 0.184221 / 0.680424 (-0.496203) | 0.021688 / 0.534201 (-0.512513) | 0.470700 / 0.579283 (-0.108583) | 0.470593 / 0.434364 (0.036229) | 0.645066 / 0.540337 (0.104729) | 0.756075 / 1.386936 (-0.630861) |

PyArrow==latest

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.009486 / 0.011353 (-0.001867) | 0.004694 / 0.011008 (-0.006314) | 0.080216 / 0.038508 (0.041708) | 0.093479 / 0.023109 (0.070369) | 0.537353 / 0.275898 (0.261455) | 0.551631 / 0.323480 (0.228151) | 0.007373 / 0.007986 (-0.000613) | 0.004044 / 0.004328 (-0.000285) | 0.075301 / 0.004250 (0.071051) | 0.069408 / 0.037052 (0.032355) | 0.527962 / 0.258489 (0.269473) | 0.559423 / 0.293841 (0.265582) | 0.039351 / 0.128546 (-0.089195) | 0.010801 / 0.075646 (-0.064845) | 0.092803 / 0.419271 (-0.326468) | 0.058876 / 0.043533 (0.015343) | 0.513742 / 0.255139 (0.258603) | 0.574666 / 0.283200 (0.291466) | 0.030277 / 0.141683 (-0.111406) | 1.884936 / 1.452155 (0.432782) | 2.008260 / 1.492716 (0.515543) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.242162 / 0.018006 (0.224156) | 0.467400 / 0.000490 (0.466910) | 0.005348 / 0.000200 (0.005148) | 0.000103 / 0.000054 (0.000049) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.038022 / 0.037411 (0.000611) | 0.108239 / 0.014526 (0.093713) | 0.121514 / 0.176557 (-0.055042) | 0.184951 / 0.737135 (-0.552184) | 0.123138 / 0.296338 (-0.173200) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.558587 / 0.215209 (0.343377) | 5.740312 / 2.077655 (3.662657) | 3.172164 / 1.504120 (1.668044) | 2.852908 / 1.541195 (1.311713) | 2.894435 / 1.468490 (1.425945) | 0.586399 / 4.584777 (-3.998378) | 4.498342 / 3.745712 (0.752630) | 4.000569 / 5.269862 (-1.269292) | 2.610988 / 4.565676 (-1.954688) | 0.068415 / 0.424275 (-0.355860) | 0.008602 / 0.007607 (0.000994) | 0.614731 / 0.226044 (0.388686) | 6.068158 / 2.268929 (3.799229) | 3.301070 / 55.444624 (-52.143554) | 2.868034 / 6.876477 (-4.008443) | 2.959072 / 2.142072 (0.816999) | 0.684174 / 4.805227 (-4.121053) | 0.154099 / 6.500664 (-6.346565) | 0.070641 / 0.075469 (-0.004828) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.835667 / 1.841788 (-0.006120) | 24.981645 / 8.074308 (16.907337) | 17.218517 / 10.191392 (7.027125) | 0.197055 / 0.680424 (-0.483368) | 0.025465 / 0.534201 (-0.508736) | 0.523498 / 0.579283 (-0.055785) | 0.528268 / 0.434364 (0.093904) | 0.599518 / 0.540337 (0.059180) | 0.887206 / 1.386936 (-0.499730) |

![](https://cml.dev/watermark.png#dd786d3b8dc94f1ab717327e88f65879b525091d "CML watermark")

Support streaming datasets with `pyarrow.parquet.read_table`.

See: https://huggingface.co/datasets/uonlp/CulturaX/discussions/2

CC: @AndreaFrancis


Update create_dataset.mdx

Show benchmarks

PyArrow==8.0.0

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.008892 / 0.011353 (-0.002461) | 0.005140 / 0.011008 (-0.005868) | 0.110951 / 0.038508 (0.072442) | 0.086159 / 0.023109 (0.063050) | 0.391117 / 0.275898 (0.115218) | 0.440884 / 0.323480 (0.117404) | 0.006562 / 0.007986 (-0.001423) | 0.003711 / 0.004328 (-0.000618) | 0.081848 / 0.004250 (0.077598) | 0.063187 / 0.037052 (0.026135) | 0.369771 / 0.258489 (0.111282) | 0.447685 / 0.293841 (0.153844) | 0.046623 / 0.128546 (-0.081923) | 0.014024 / 0.075646 (-0.061622) | 0.418556 / 0.419271 (-0.000715) | 0.064660 / 0.043533 (0.021127) | 0.379416 / 0.255139 (0.124277) | 0.415800 / 0.283200 (0.132600) | 0.036899 / 0.141683 (-0.104784) | 1.710280 / 1.452155 (0.258125) | 1.932326 / 1.492716 (0.439610) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.311351 / 0.018006 (0.293345) | 0.621121 / 0.000490 (0.620631) | 0.013677 / 0.000200 (0.013477) | 0.000543 / 0.000054 (0.000488) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.031310 / 0.037411 (-0.006102) | 0.099546 / 0.014526 (0.085020) | 0.122100 / 0.176557 (-0.054457) | 0.186477 / 0.737135 (-0.550659) | 0.116634 / 0.296338 (-0.179704) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.574639 / 0.215209 (0.359430) | 5.976678 / 2.077655 (3.899023) | 2.535482 / 1.504120 (1.031362) | 2.248873 / 1.541195 (0.707678) | 2.361696 / 1.468490 (0.893205) | 0.866700 / 4.584777 (-3.718077) | 5.298018 / 3.745712 (1.552306) | 4.753240 / 5.269862 (-0.516622) | 3.124698 / 4.565676 (-1.440979) | 0.101852 / 0.424275 (-0.322423) | 0.009117 / 0.007607 (0.001510) | 0.723730 / 0.226044 (0.497685) | 7.172649 / 2.268929 (4.903720) | 3.400410 / 55.444624 (-52.044214) | 2.626619 / 6.876477 (-4.249857) | 2.948692 / 2.142072 (0.806620) | 0.991589 / 4.805227 (-3.813638) | 0.208902 / 6.500664 (-6.291762) | 0.076172 / 0.075469 (0.000703) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.621880 / 1.841788 (-0.219907) | 22.735673 / 8.074308 (14.661365) | 20.376990 / 10.191392 (10.185598) | 0.232219 / 0.680424 (-0.448204) | 0.028616 / 0.534201 (-0.505585) | 0.455725 / 0.579283 (-0.123558) | 0.562796 / 0.434364 (0.128432) | 0.545344 / 0.540337 (0.005007) | 0.759440 / 1.386936 (-0.627496) |

PyArrow==latest

Show updated benchmarks!

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.009845 / 0.011353 (-0.001508) | 0.005289 / 0.011008 (-0.005719) | 0.083117 / 0.038508 (0.044609) | 0.098467 / 0.023109 (0.075357) | 0.532345 / 0.275898 (0.256447) | 0.571000 / 0.323480 (0.247520) | 0.007223 / 0.007986 (-0.000763) | 0.004442 / 0.004328 (0.000114) | 0.081710 / 0.004250 (0.077459) | 0.071132 / 0.037052 (0.034080) | 0.540093 / 0.258489 (0.281604) | 0.582244 / 0.293841 (0.288403) | 0.048509 / 0.128546 (-0.080038) | 0.013897 / 0.075646 (-0.061749) | 0.092579 / 0.419271 (-0.326692) | 0.073409 / 0.043533 (0.029876) | 0.537369 / 0.255139 (0.282230) | 0.551403 / 0.283200 (0.268203) | 0.038847 / 0.141683 (-0.102835) | 1.940848 / 1.452155 (0.488693) | 2.045597 / 1.492716 (0.552881) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.303883 / 0.018006 (0.285877) | 0.600237 / 0.000490 (0.599748) | 0.006030 / 0.000200 (0.005830) | 0.000124 / 0.000054 (0.000070) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.036633 / 0.037411 (-0.000778) | 0.105853 / 0.014526 (0.091327) | 0.126289 / 0.176557 (-0.050267) | 0.190022 / 0.737135 (-0.547113) | 0.123251 / 0.296338 (-0.173087) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.711893 / 0.215209 (0.496684) | 6.979781 / 2.077655 (4.902126) | 3.491514 / 1.504120 (1.987394) | 3.268077 / 1.541195 (1.726882) | 3.241777 / 1.468490 (1.773287) | 0.875913 / 4.584777 (-3.708864) | 5.458421 / 3.745712 (1.712709) | 4.818355 / 5.269862 (-0.451507) | 3.256046 / 4.565676 (-1.309631) | 0.095000 / 0.424275 (-0.329275) | 0.009072 / 0.007607 (0.001465) | 0.818468 / 0.226044 (0.592424) | 8.027702 / 2.268929 (5.758773) | 4.363234 / 55.444624 (-51.081390) | 3.695269 / 6.876477 (-3.181207) | 3.902601 / 2.142072 (1.760528) | 1.039007 / 4.805227 (-3.766220) | 0.212050 / 6.500664 (-6.288614) | 0.081438 / 0.075469 (0.005969) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.746945 / 1.841788 (-0.094842) | 25.274283 / 8.074308 (17.199975) | 23.514717 / 10.191392 (13.323325) | 0.232580 / 0.680424 (-0.447843) | 0.032083 / 0.534201 (-0.502118) | 0.482873 / 0.579283 (-0.096410) | 0.585730 / 0.434364 (0.151366) | 0.602066 / 0.540337 (0.061729) | 0.796391 / 1.386936 (-0.590546) |

![](https://cml.dev/watermark.png#0d7cb68fe37dbfd81e5f82e19d8f9847c337788d "CML watermark")

modified , as AudioFolder and ImageFolder not in Dataset Library.

``` from datasets import AudioFolder ```  and ```from datasets import ImageFolder```  to ```from datasets import load_dataset```

```
cannot import name 'AudioFolder' from 'datasets' (/home/eswardivi/miniconda3/envs/Hugformers/lib/python3.10/site-packages/datasets/__init__.py)

```


Add new column to dataset

I think it's an issue with the code.

Specifically:
```python
dataset = dataset['train'].add_column("/workspace/data", new_column)
```

Now `dataset` is the train set with a new column.
To fix this, you can do:

```python
dataset['train'] = dataset['train'].add_column("/workspace/data", new_column)
```

> I think it's an issue with the code.
>
> Specifically:
>
> ```python
> dataset = dataset['train'].add_column("/workspace/data", new_column)
> ```
>
> Now `dataset` is the train set with a new column. To fix this, you can do:
>
> ```python
> dataset['train'] = dataset['train'].add_column("/workspace/data", new_column)
> ```

Thanks for your response, but i can not access mask images, please let me know why the problem still persists. Here is the notebook for reference: https://colab.research.google.com/drive/10lZ_zLtU4itYVmIVTvIEVbjfOtCZaAZy?usp=sharing

I think there is a slight misunderstanding.
```python
new_column = ["mask"] * len(dataset["train"])
dataset['train'] = dataset['train'].add_column("/workspace/data", new_column)
```

adds a column with the string `mask` to your dataset.
If you're trying to load the images `"mask_{idx}.png"` in your dataset, you could try:

```
from datasets import Image

dataset['train'] = dataset['train'].map(lambda u, idx: {'mask': f"/workspace/data/mask_{idx}.png", with_indices=True).cast_column("mask", Image())
```

What this does is that it adds a column to your dataset name `mask` with the path to the mask, then it cast the column as an `Image` feature.

This [link](https://huggingface.co/docs/datasets/v2.5.1/en/image_load) explains how to load images.

Hope this helps!

> I think there is a slight misunderstanding.
>
> ```python
> new_column = ["mask"] * len(dataset["train"])
> dataset['train'] = dataset['train'].add_column("/workspace/data", new_column)
> ```
>
> adds a column with the string `mask` to your dataset. If you're trying to load the images `"mask_{idx}.png"` in your dataset, you could try:
>
> ```
> from datasets import Image
>
> dataset['train'] = dataset['train'].map(lambda u, idx: {'mask': f"/workspace/data/mask_{idx}.png", with_indices=True).cast_column("mask", Image())
> ```
>
> What this does is that it adds a column to your dataset name `mask` with the path to the mask, then it cast the column as an `Image` feature.
>
> This [link](https://huggingface.co/docs/datasets/v2.5.1/en/image_load) explains how to load images.
>
> Hope this helps!

Thank you very much, this is really helpful...
i made some changes for it to work:
```
dataset['train'] = dataset['train'].map(lambda u, idx: {'mask': f"/content/data/mask_{idx}.png"}, with_indices=True).cast_column("mask", Image())
```
Thanks Again @Dref360

### Describe the bug

```
---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
[<ipython-input-9-bd197b36b6a0>](https://localhost:8080/#) in <cell line: 1>()
----> 1 dataset['train']['/workspace/data']

3 frames
[/usr/local/lib/python3.10/dist-packages/datasets/formatting/formatting.py](https://localhost:8080/#) in _check_valid_column_key(key, columns)
    518 def _check_valid_column_key(key: str, columns: List[str]) -> None:
    519     if key not in columns:
--> 520         raise KeyError(f"Column {key} not in the dataset. Current columns in the dataset: {columns}")
    521
    522

KeyError: "Column train not in the dataset. Current columns in the dataset: ['image', '/workspace/data']"
```

### Steps to reproduce the bug

please find the notebook for reference: https://colab.research.google.com/drive/10lZ_zLtU4itYVmIVTvIEVbjfOtCZaAZy?usp=sharing

### Expected behavior

add column to the dataset

### Environment info

colab pro