Jefffrey commented on PR #10614: URL: https://github.com/apache/arrow-rs/pull/10614#issuecomment-5323417726
> on a slightly unrelated note, > > @Jefffrey do you think `generic_bytes_dictionary_builder` could benefit from a `append_array()` method. it would take in a byte array (utf8/large/view/binary/...) and insert all of their elements into the dictionary at once instead of doing this in a loop. The goal is to squeeze out as much performance out of `cast(stringArray -> dictArray)` as possible. > > https://github.com/apache/arrow-rs/blob/a5845cc14b23dc680115c6b1e7e8dd2f724a0631/arrow-array/src/builder/generic_bytes_dictionary_builder.rs#L327 > > currently the cast kernal for `stringArr -> dictArray` is > > https://github.com/apache/arrow-rs/blob/a5845cc14b23dc680115c6b1e7e8dd2f724a0631/arrow-cast/src/cast/dictionary.rs#L506 > > which does this in a loop > > https://github.com/apache/arrow-rs/blob/a5845cc14b23dc680115c6b1e7e8dd2f724a0631/arrow-cast/src/cast/dictionary.rs#L524 if we can get some good numbers from this then would be worth exploring 👀 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
