jorisvandenbossche commented on issue #35209:
URL: https://github.com/apache/arrow/issues/35209#issuecomment-1516146714
> (*) I noticed horrible performance when trying to load CSV data using
`column_types={"col": pa.dictionary(pa.int64(), pa.string())}` or
`column_types={"col": pa.dictionary(pa.int16(), **pa.string())}` or
`column_types={"col": pa.dictionary(pa.uint32(), pa.string())}`. Only `int32`
seems to behave as expected, performance-wise. If this is a bug I can open
another issue.
This seems something to fix. Yes, if you could open a separate issue for
this, that would be great.
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