cyb70289 commented on pull request #10283:
URL: https://github.com/apache/arrow/pull/10283#issuecomment-836076149
**NOTE:** Below benchmark results are the same, but the total run time
differs much. The saved time is from test preparation (generating random bools
by calling bernoulli_distribution), not the test itself.
Test on Neoverse N1, clang10.
Before: **59.9s** total run time
```
$ time release/arrow-compute-aggregate-benchmark
--benchmark_filter="ModeKernelNarrow<BooleanType>/1048576/10000"
------------------------------------------------------------------------------------------------------
Benchmark Time CPU
Iterations UserCounters...
------------------------------------------------------------------------------------------------------
ModeKernelNarrow<BooleanType>/1048576/10000 637 us 637 us
1097 bytes_per_second=1.53351G/s null_percent=0.01 size=1048.58k
real 0m59.902s
user 0m59.880s
sys 0m0.020s
```
After: **1.2s** total run time
```
$ time release/arrow-compute-aggregate-benchmark
--benchmark_filter="ModeKernelNarrow<BooleanType>/1048576/10000"
------------------------------------------------------------------------------------------------------
Benchmark Time CPU
Iterations UserCounters...
------------------------------------------------------------------------------------------------------
ModeKernelNarrow<BooleanType>/1048576/10000 637 us 637 us
1098 bytes_per_second=1.53253G/s null_percent=0.01 size=1048.58k
real 0m1.210s
user 0m1.202s
sys 0m0.008s
```
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