aryan-cloud opened a new pull request, #48732: URL: https://github.com/apache/arrow/pull/48732
### Rationale for this change Fuse definition level counting into a bitmap-based pass to reduce extra memory traversal and improve cache/SIMD efficiency, addressing the TODO in column_reader.cc. ### What changes are included in this PR? Replace std::count with a bitmap/PopCount helper for counting max definition levels in ReadLevels. ### Are these changes tested? yes cpp/build-asan/debug/parquet-encoding-test --gtest_filter=* cpp/build-asan/debug/parquet-arrow-internals-test --gtest_filter=* ### Are there any user-facing changes? No. -- 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]
