jhorstmann opened a new issue, #9216: URL: https://github.com/apache/arrow-rs/issues/9216
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** The benchmarks added in #9209 show a significant overhead when reading data nested in structs from parquet. Profiling shows a simple performance hotspot in [appending individual bits to a `BooleanBufferBuilder`](https://github.com/apache/arrow-rs/blob/7e54bb22389bf9682efb326a573e30380cdca0d8/parquet/src/arrow/record_reader/definition_levels.rs#L165). **Describe the solution you'd like** We can use the new `extend_trusted_len` method introduced in #9137 to optimize this pattern. **Describe alternatives you've considered** **Additional context** <!-- Add any other context or screenshots about the feature request here. --> -- 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]
