**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.
{
    if (in->eof())
        return false;
    readLineObject(*columns[0]);
    return true;
}
void registerInputFormatLineAsString(FormatFactory & factory)
{
    factory.registerInputFormat("LineAsString", [](
            ReadBuffer & buf,
            const Block & sample,
            const RowInputFormatParams & params,
            const FormatSettings &)
    {
        return std::make_shared<LineAsStringRowInputFormat>(sample, buf, params);
    });
}
void registerLineAsStringSchemaReader(FormatFactory & factory)
{
    factory.registerExternalSchemaReader("LineAsString", [](
            const FormatSettings &)
    {
        return std::make_shared<LinaAsStringSchemaReader>();
    });
}
}