cyb70289 removed a comment on pull request #8091:
URL: https://github.com/apache/arrow/pull/8091#issuecomment-684666816
Tested on skylake (knight landing).
Removed unrelated tests for clarity.
100% null benchmark is not stable, can be ignored.
```
$ archery benchmark diff --suite-filter="arrow-compute-aggregate-benchmark"
--cc=clang-9 --cxx=clang++-9
benchmark baseline contender
change %
1 ModeKernelInt16/1048576/10 122.148 MiB/sec 364.273 MiB/sec
198.222 {'null_percent': 10.0}
24 ModeKernelInt32/1048576/10000 227.845 MiB/sec 676.265 MiB/sec
196.809 {'null_percent': 0.01}
14 ModeKernelInt16/1048576/100 116.265 MiB/sec 342.747 MiB/sec
194.798 {'null_percent': 1.0}
23 ModeKernelInt32/1048576/100 229.216 MiB/sec 669.534 MiB/sec
192.098 {'null_percent': 1.0}
17 ModeKernelInt32/1048576/10 241.768 MiB/sec 700.500 MiB/sec
189.740 {'null_percent': 10.0}
16 ModeKernelInt16/1048576/10000 115.484 MiB/sec 324.841 MiB/sec
181.287 {'null_percent': 0.01}
8 ModeKernelInt64/1048576/10000 481.374 MiB/sec 1.308 GiB/sec
178.214 {'null_percent': 0.01}
10 ModeKernelInt64/1048576/100 485.696 MiB/sec 1.313 GiB/sec
176.807 {'null_percent': 1.0}
20 ModeKernelInt64/1048576/10 527.967 MiB/sec 1.383 GiB/sec
168.292 {'null_percent': 10.0}
12 ModeKernelInt32/1048576/0 257.092 MiB/sec 687.083 MiB/sec
167.251 {'null_percent': 0.0}
15 ModeKernelInt16/1048576/0 128.398 MiB/sec 342.670 MiB/sec
166.880 {'null_percent': 0.0}
11 ModeKernelInt64/1048576/0 513.891 MiB/sec 1.325 GiB/sec
164.088 {'null_percent': 0.0}
4 ModeKernelInt16/1048576/2 162.258 MiB/sec 384.148 MiB/sec
136.752 {'null_percent': 50.0}
25 ModeKernelInt32/1048576/2 320.094 MiB/sec 650.958 MiB/sec
103.365 {'null_percent': 50.0}
2 ModeKernelInt64/1048576/2 811.335 MiB/sec 1.403 GiB/sec
77.111 {'null_percent': 50.0}
0 ModeKernelInt64/1048576/1 7.906 GiB/sec 7.888 GiB/sec
-0.230 {'null_percent': 100.0}
9 ModeKernelBoolean/1048576/0 26.502 MiB/sec 26.148 MiB/sec
-1.337 {'null_percent': 0.0}
19 ModeKernelBoolean/1048576/2 27.081 MiB/sec 26.518 MiB/sec
-2.078 {'null_percent': 50.0}
18 ModeKernelBoolean/1048576/10000 26.126 MiB/sec 25.361 MiB/sec
-2.927 {'null_percent': 0.01}
5 ModeKernelBoolean/1048576/10 27.987 MiB/sec 27.111 MiB/sec
-3.131 {'null_percent': 10.0}
27 ModeKernelBoolean/1048576/100 25.729 MiB/sec 24.911 MiB/sec
-3.181 {'null_percent': 1.0}
28 ModeKernelBoolean/1048576/1 123.582 MiB/sec 118.548 MiB/sec
-4.074 {'null_percent': 100.0}
6 ModeKernelInt8/1048576/10000 248.084 MiB/sec 232.688 MiB/sec
-6.206 {'null_percent': 0.01}
21 ModeKernelInt8/1048576/100 253.614 MiB/sec 230.012 MiB/sec
-9.306 {'null_percent': 1.0}
26 ModeKernelInt8/1048576/0 270.337 MiB/sec 244.879 MiB/sec
-9.417 {'null_percent': 0.0}
3 ModeKernelInt8/1048576/10 247.946 MiB/sec 223.306 MiB/sec
-9.938 {'null_percent': 10.0}
13 ModeKernelInt8/1048576/2 198.628 MiB/sec 178.205 MiB/sec
-10.282 {'null_percent': 50.0}
29 ModeKernelInt8/1048576/1 948.757 MiB/sec 828.408 MiB/sec
-12.685 {'null_percent': 100.0}
22 ModeKernelInt16/1048576/1 2.852 GiB/sec 2.265 GiB/sec
-20.587 {'null_percent': 100.0}
7 ModeKernelInt32/1048576/1 5.714 GiB/sec 3.430 GiB/sec
-39.976 {'null_percent': 100.0}
```
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