**Describe the situation**

```
SELECT * FROM test.hits INTO OUTFILE 'dump.csv' FORMAT CSV

8873898 rows in set. Elapsed: 32.487 sec. Processed 8.87 million rows, 8.46 GB (273.15 thousand rows/s., 260.42 MB/s.)
```

is bounded by single CPU core. Too slow :(
#include <Client/ClientBase.h>
#include <iostream>
#include <iomanip>
#include <filesystem>
#include <base/argsToConfig.h>
#include <base/DateLUT.h>
#include <base/LocalDate.h>
#include <base/LineReader.h>
#include <base/scope_guard_safe.h>
#include "Columns/ColumnString.h"
#include "Columns/ColumnsNumber.h"
#include "Core/Block.h"