**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.
{
    return checkStringByFirstCharacterAndAssertTheRest(s.c_str(), buf);
}
inline bool checkStringByFirstCharacterAndAssertTheRestCaseInsensitive(const String & s, ReadBuffer & buf)
{
    return checkStringByFirstCharacterAndAssertTheRestCaseInsensitive(s.c_str(), buf);
}
inline void readBoolText(bool & x, ReadBuffer & buf)
{
    char tmp = '0';
    readChar(tmp, buf);
    x = tmp != '0';
}
inline void readBoolTextWord(bool & x, ReadBuffer & buf, bool support_upper_case = false)
{
    if (buf.eof())
        throwReadAfterEOF();
    switch (*buf.position())
    {
        case 't':
            assertString("true", buf);
            x = true;
            break;
        case 'f':
            assertString("false", buf);
            x = false;
            break;
        case 'T':
        {
            if (support_upper_case)