cyb70289 commented on pull request #8671:
URL: https://github.com/apache/arrow/pull/8671#issuecomment-727702783
Tested on `Xeon(R) Gold 5218 CPU @ 2.30GHz` (skylake).
gcc-7.5 has big improvement.
```
benchmark baseline
contender change %
7 GreaterArrayScalarInt64/32768/1 584.172m items/sec 1.455b
items/sec 149.105 {'null_percent': 100.0}
16 GreaterArrayScalarInt64/32768/0 585.510m items/sec 1.457b
items/sec 148.920 {'null_percent': 0.0}
5 GreaterArrayScalarInt64/32768/2 583.826m items/sec 1.451b
items/sec 148.611 {'null_percent': 50.0}
6 GreaterArrayScalarInt64/32768/10 583.846m items/sec 1.449b
items/sec 148.178 {'null_percent': 10.0}
2 GreaterArrayScalarInt64/32768/10000 584.545m items/sec 1.448b
items/sec 147.702 {'null_percent': 0.01}
15 GreaterArrayScalarInt64/32768/100 585.013m items/sec 1.446b
items/sec 147.107 {'null_percent': 1.0}
0 GreaterArrayArrayInt64/32768/0 396.250m items/sec 921.516m
items/sec 132.559 {'null_percent': 0.0}
8 GreaterArrayArrayInt64/32768/1 395.204m items/sec 917.636m
items/sec 132.193 {'null_percent': 100.0}
19 GreaterArrayArrayInt64/32768/100 394.544m items/sec 913.442m
items/sec 131.518 {'null_percent': 1.0}
20 GreaterArrayArrayInt64/32768/10000 392.995m items/sec 908.788m
items/sec 131.247 {'null_percent': 0.01}
14 GreaterArrayArrayInt64/32768/2 394.104m items/sec 909.476m
items/sec 130.771 {'null_percent': 50.0}
11 GreaterArrayArrayInt64/32768/10 394.966m items/sec 898.748m
items/sec 127.551 {'null_percent': 10.0}
10 GreaterArrayScalarString/32768/1 884.277m items/sec 956.126m
items/sec 8.125 {'null_percent': 100.0}
1 GreaterArrayArrayString/32768/1 305.843m items/sec 302.862m
items/sec -0.975 {'null_percent': 100.0}
21 GreaterArrayScalarString/32768/2 278.355m items/sec 273.676m
items/sec -1.681 {'null_percent': 50.0}
22 GreaterArrayArrayString/32768/2 140.984m items/sec 137.974m
items/sec -2.135 {'null_percent': 50.0}
12 GreaterArrayArrayString/32768/100 103.022m items/sec 98.360m
items/sec -4.525 {'null_percent': 1.0}
4 GreaterArrayArrayString/32768/10 104.032m items/sec 99.117m
items/sec -4.724 {'null_percent': 10.0}
13 GreaterArrayArrayString/32768/0 103.551m items/sec 98.652m
items/sec -4.731 {'null_percent': 0.0}
3 GreaterArrayArrayString/32768/10000 103.255m items/sec 97.749m
items/sec -5.332 {'null_percent': 0.01}
23 GreaterArrayScalarString/32768/10000 964.903m items/sec 912.461m
items/sec -5.435 {'null_percent': 0.01}
18 GreaterArrayScalarString/32768/100 924.999m items/sec 874.072m
items/sec -5.506 {'null_percent': 1.0}
17 GreaterArrayScalarString/32768/0 973.155m items/sec 917.459m
items/sec -5.723 {'null_percent': 0.0}
9 GreaterArrayScalarString/32768/10 701.792m items/sec 630.090m
items/sec -10.217 {'null_percent': 10.0}
```
clang-9 no benefit.
```
benchmark baseline
contender change %
3 GreaterArrayScalarInt64/32768/1 2.863b items/sec 2.891b
items/sec 0.977 {'null_percent': 100.0}
12 GreaterArrayScalarInt64/32768/10 2.845b items/sec 2.860b
items/sec 0.548 {'null_percent': 10.0}
9 GreaterArrayArrayInt64/32768/1 1.959b items/sec 1.967b
items/sec 0.381 {'null_percent': 100.0}
15 GreaterArrayArrayString/32768/0 118.703m items/sec 118.738m
items/sec 0.030 {'null_percent': 0.0}
20 GreaterArrayArrayString/32768/10000 118.455m items/sec 118.476m
items/sec 0.018 {'null_percent': 0.01}
8 GreaterArrayScalarInt64/32768/2 2.873b items/sec 2.870b
items/sec -0.089 {'null_percent': 50.0}
14 GreaterArrayArrayInt64/32768/2 1.943b items/sec 1.941b
items/sec -0.130 {'null_percent': 50.0}
6 GreaterArrayArrayInt64/32768/0 1.980b items/sec 1.977b
items/sec -0.145 {'null_percent': 0.0}
7 GreaterArrayArrayString/32768/100 119.003m items/sec 118.708m
items/sec -0.248 {'null_percent': 1.0}
17 GreaterArrayArrayInt64/32768/100 1.961b items/sec 1.947b
items/sec -0.683 {'null_percent': 1.0}
16 GreaterArrayScalarInt64/32768/0 2.901b items/sec 2.881b
items/sec -0.701 {'null_percent': 0.0}
5 GreaterArrayArrayInt64/32768/10 1.961b items/sec 1.945b
items/sec -0.834 {'null_percent': 10.0}
21 GreaterArrayArrayInt64/32768/10000 1.967b items/sec 1.939b
items/sec -1.399 {'null_percent': 0.01}
1 GreaterArrayScalarInt64/32768/100 2.854b items/sec 2.813b
items/sec -1.430 {'null_percent': 1.0}
2 GreaterArrayScalarInt64/32768/10000 2.869b items/sec 2.806b
items/sec -2.201 {'null_percent': 0.01}
23 GreaterArrayScalarString/32768/2 231.294m items/sec 223.778m
items/sec -3.250 {'null_percent': 50.0}
22 GreaterArrayArrayString/32768/10 124.178m items/sec 119.522m
items/sec -3.750 {'null_percent': 10.0}
4 GreaterArrayArrayString/32768/2 163.400m items/sec 139.325m
items/sec -14.734 {'null_percent': 50.0}
0 GreaterArrayArrayString/32768/1 815.032m items/sec 688.068m
items/sec -15.578 {'null_percent': 100.0}
13 GreaterArrayScalarString/32768/1 1.100b items/sec 858.483m
items/sec -21.922 {'null_percent': 100.0}
11 GreaterArrayScalarString/32768/10 655.258m items/sec 490.804m
items/sec -25.098 {'null_percent': 10.0}
18 GreaterArrayScalarString/32768/100 976.617m items/sec 626.209m
items/sec -35.880 {'null_percent': 1.0}
10 GreaterArrayScalarString/32768/0 1.039b items/sec 650.698m
items/sec -37.376 {'null_percent': 0.0}
19 GreaterArrayScalarString/32768/10000 1.033b items/sec 646.860m
items/sec -37.397 {'null_percent': 0.01}
```
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