HuaHuaY commented on PR #47294:
URL: https://github.com/apache/arrow/pull/47294#issuecomment-3997703287

   We're experiencing a performance regression with the Parquet reader on our 
internal program. We are still locating the regression and suspecting it's 
related to this PR. I checked the full Conbench report, which mentions several 
unstable performance issues, all seemingly related to the changes in this PR. 
However, the URLs in the report is no longer accessible.


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