zhuqi-lucas commented on PR #15348: URL: https://github.com/apache/datafusion/pull/15348#issuecomment-2749930210
> Thank you for the work on better Utf8View support. I tried one sort benchmark with sort-preserving merging on a single `Utf8View` column, but it gets slower: > > Reproducer > > ``` > cargo run --profile release-nonlto --bin dfbench -- sort-tpch -p /Users/yongting/Code/datafusion/benchmarks/data/tpch_sf10 -q 3 > ``` > > main: 8s pr: 10s > > According to the flamegraph, an extra overhead of `libsystem_platform.dylib_platform_memcmp` showed up inside `SortPreservingMergeStream` It's not obvious why, I'll try to help figure it out later. > > [flamegraphs.zip](https://github.com/user-attachments/files/19388551/flamegraphs.zip) This one also deserve a new ticket to investigation, created a ticket now: https://github.com/apache/datafusion/issues/15403 cc @2010YOUY01 @alamb -- 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: github-unsubscr...@datafusion.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org
