cyb70289 commented on pull request #11828:
URL: https://github.com/apache/arrow/pull/11828#issuecomment-986390436


   Two benchmarks show big gaps per my test on M1.
   First one is much faster built with normal clang in docker. Second one is 
the reverse.
   **NOTE**: run `git checkout 6d3fb1a4b` to go ahead of this PR before doing 
benchmark.
   
   | Suite | Benchmark | AppleClang on host | Clang in ubuntu docker |
   | ----- | --------- | ------------------ | ---------------------- |
   | arrow-csv-parser-benchmark | ParseCSVStocksExample | 463.867M/s | 
1.46234G/s |
   | arrow-decimal-benchmark | Constants | 492.496M/s | 80.0724M/s |


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