sahuagin opened a new issue, #9784: URL: https://github.com/apache/arrow-rs/issues/9784
When a caller skips all remaining values on a page (`to_skip >= values_left`), `last_value` will not be read again after the skip completes. The current `skip()` implementation always decodes values through `get_batch` to maintain `last_value` accuracy, which requires a heap-allocated scratch buffer and unnecessary decode work. **Proposed fix:** Detect the terminal case upfront. When terminal, use `BitReader::skip(n, bit_width)` to advance the bit reader without decoding individual values, and return early without updating `last_value`. This avoids the scratch-buffer allocation entirely for the common "skip rest of page" case. **Measured improvement (arrow_reader bench, vs upstream HEAD):** - mixed stepped skip: -3.9% -- 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]
