pitrou edited a comment on pull request #10487:
URL: https://github.com/apache/arrow/pull/10487#issuecomment-870768509
Locally, I seem to get varying results from run to run (and also depending
on the compiler), but `archery benchmark diff` doesn't show very worrying
regressions with clang 10:
```
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Non-regressions: (11)
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
benchmark baseline contender change
%
counters
ArrayArrayKernel<KleeneAnd>/524288/1 4.309 GiB/sec 5.868 GiB/sec
36.176 {'run_name': 'ArrayArrayKernel<KleeneAnd>/524288/1', 'repetitions':
0, 'repetition_index': 0, 'threads': 1, 'iterations': 6226, 'null_percent':
100.0}
ArrayArrayKernel<KleeneAnd>/524288/10 4.337 GiB/sec 5.888 GiB/sec
35.749 {'run_name': 'ArrayArrayKernel<KleeneAnd>/524288/10', 'repetitions':
0, 'repetition_index': 0, 'threads': 1, 'iterations': 6226, 'null_percent':
10.0}
ArrayArrayKernel<KleeneAnd>/524288/100 4.335 GiB/sec 5.850 GiB/sec
34.939 {'run_name': 'ArrayArrayKernel<KleeneAnd>/524288/100', 'repetitions':
0, 'repetition_index': 0, 'threads': 1, 'iterations': 6232, 'null_percent': 1.0}
ArrayArrayKernel<KleeneAnd>/524288/10000 4.318 GiB/sec 5.755 GiB/sec
33.290 {'run_name': 'ArrayArrayKernel<KleeneAnd>/524288/10000', 'repetitions':
0, 'repetition_index': 0, 'threads': 1, 'iterations': 6221, 'null_percent':
0.01}
ArrayArrayKernel<KleeneAnd>/524288/2 4.365 GiB/sec 5.762 GiB/sec
31.994 {'run_name': 'ArrayArrayKernel<KleeneAnd>/524288/2', 'repetitions':
0, 'repetition_index': 0, 'threads': 1, 'iterations': 6200, 'null_percent':
50.0}
ArrayArrayKernel<KleeneAnd>/32768/1 3.204 GiB/sec 4.220 GiB/sec
31.726 {'run_name': 'ArrayArrayKernel<KleeneAnd>/32768/1', 'repetitions': 0,
'repetition_index': 0, 'threads': 1, 'iterations': 75304, 'null_percent': 100.0}
ArrayArrayKernel<KleeneAnd>/32768/2 3.370 GiB/sec 4.212 GiB/sec
24.961 {'run_name': 'ArrayArrayKernel<KleeneAnd>/32768/2', 'repetitions':
0, 'repetition_index': 0, 'threads': 1, 'iterations': 77611, 'null_percent':
50.0}
ArrayArrayKernel<KleeneAnd>/32768/10000 3.360 GiB/sec 4.197 GiB/sec
24.906 {'run_name': 'ArrayArrayKernel<KleeneAnd>/32768/10000', 'repetitions':
0, 'repetition_index': 0, 'threads': 1, 'iterations': 76897, 'null_percent':
0.01}
ArrayArrayKernel<KleeneAnd>/32768/10 3.373 GiB/sec 4.208 GiB/sec
24.745 {'run_name': 'ArrayArrayKernel<KleeneAnd>/32768/10', 'repetitions':
0, 'repetition_index': 0, 'threads': 1, 'iterations': 76903, 'null_percent':
10.0}
ArrayArrayKernel<KleeneAnd>/32768/100 3.383 GiB/sec 4.202 GiB/sec
24.212 {'run_name': 'ArrayArrayKernel<KleeneAnd>/32768/100', 'repetitions':
0, 'repetition_index': 0, 'threads': 1, 'iterations': 77559, 'null_percent':
1.0}
ArrayArrayKernel<KleeneAnd>/32768/0 7.838 GiB/sec 7.956 GiB/sec
1.499 {'run_name': 'ArrayArrayKernel<KleeneAnd>/32768/0', 'repetitions': 0,
'repetition_index': 0, 'threads': 1, 'iterations': 187182, 'null_percent': 0.0}
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Regressions: (1)
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
benchmark baseline contender change %
counters
ArrayArrayKernel<KleeneAnd>/524288/0 15.853 GiB/sec 14.343 GiB/sec -9.527
{'run_name': 'ArrayArrayKernel<KleeneAnd>/524288/0', 'repetitions': 0,
'repetition_index': 0, 'threads': 1, 'iterations': 23504, 'null_percent': 0.0}
```
(on Ubuntu 20.04, AMD Ryzen 3900)
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