haohuaijin commented on PR #10141:
URL: https://github.com/apache/arrow-rs/pull/10141#issuecomment-4810052243

   FYI, today I ran `arrow_reader_clickbench` 3 times in #10217, which is a 
no-op PR (one-char README change), so it's basically main vs main. The 
run-to-run noise is still large:
   - sync/Q13 shows the branch ~14–24% "slower" in all 3 runs, with identical 
code.
   - Run 2 was much noisier: async/Q21 was +34%, while the other runs had it 
within ±2%.


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