**Describe the situation**
https://markify.dev/p/zfrQMV2/text

**How to reproduce**
On aws `c5ad.24xlarge` run a query:

```
SET max_memory_usage = '100G', max_threads = 1000, max_insert_threads = 96

INSERT INTO wikistat WITH
    parseDateTimeBestEffort(extract(toLowCardinality(_path), 'pageviews-([\\d\\-]+)\\.gz$')) AS time,
    splitByChar(' ', line) AS values,
    splitByChar('.', values[1]) AS projects
SELECT
    time,
    projects[1] AS project,
    projects[2] AS subproject,
    values[2] AS path,
    CAST(values[3], 'UInt64') AS hits
FROM s3('https://....s3.eu-central-1.amazonaws.com/wikistat/original/*.gz', '...', '...', LineAsString, auto)
WHERE length(values) >= 3
```

Performance is not bad (22 million rows are inserted per second) but can be better.
template <is_integer T>
inline void readTextWithSizeSuffix(T & x, ReadBuffer & buf)
{
    readIntText(x, buf);
    if (buf.eof())
        return;
    
    auto finish = [&buf, &x] (UInt64 base, int power_of_two) mutable
    {
        ++buf.position();
        if (buf.eof())
        {
            x *= base; 
        }
        else if (*buf.position() == 'i')
        {
            x = (x << power_of_two); 
            ++buf.position();
        }
        return;
    };
    switch (*buf.position())
    {
        case 'k': [[fallthrough]];
        case 'K':
            finish(1000, 10);
            break;