wesm commented on pull request #7516:
URL: https://github.com/apache/arrow/pull/7516#issuecomment-647883524
I improved the output to show the `state.counters` stuff
```
benchmark baselinecontender change %
counters
40UniqueInt64/56.442 GiB/sec 18.346 GiB/sec 184.782
{'iterations': 145, 'null_percent': 100.0}
0UniqueInt64/116.500 GiB/sec 18.364 GiB/sec 182.522
{'iterations': 145, 'null_percent': 100.0}
11UniqueUInt8/5 812.047 MiB/sec1.755 GiB/sec 121.298
{'iterations': 142, 'null_percent': 100.0}
7 UniqueUInt8/1 683.943 MiB/sec1.253 GiB/sec87.593
{'iterations': 117, 'null_percent': 0.1}
38UniqueUInt8/4 762.983 MiB/sec 950.521 MiB/sec24.580
{'iterations': 133, 'null_percent': 99.0}
29UniqueUInt8/2 659.082 MiB/sec 820.410 MiB/sec24.478
{'iterations': 114, 'null_percent': 1.0}
5 UniqueInt64/12.656 GiB/sec3.300 GiB/sec24.223
{'iterations': 60, 'null_percent': 0.1}
32UniqueInt64/45.627 GiB/sec6.772 GiB/sec20.349
{'iterations': 119, 'null_percent': 99.0}
25 UniqueInt64/105.234 GiB/sec6.294 GiB/sec20.254
{'iterations': 110, 'null_percent': 99.0}
39 UniqueString100bytes/11 26.815 GiB/sec 31.122 GiB/sec16.061
{'iterations': 48, 'null_percent': 100.0}
23UniqueString10bytes/52.691 GiB/sec3.113 GiB/sec15.667
{'iterations': 48, 'null_percent': 100.0}
34 UniqueString100bytes/5 26.944 GiB/sec 31.015 GiB/sec15.108
{'iterations': 48, 'null_percent': 100.0}
6UniqueString10bytes/112.699 GiB/sec3.096 GiB/sec14.721
{'iterations': 49, 'null_percent': 100.0}
21 UniqueString100bytes/71.947 GiB/sec2.217 GiB/sec13.866
{'iterations': 3, 'null_percent': 0.1}
28UniqueInt64/22.622 GiB/sec2.904 GiB/sec10.770
{'iterations': 59, 'null_percent': 1.0}
13UniqueInt64/32.157 GiB/sec2.343 GiB/sec 8.644
{'iterations': 48, 'null_percent': 10.0}
33 UniqueString100bytes/4 24.286 GiB/sec 26.030 GiB/sec 7.181
{'iterations': 43, 'null_percent': 99.0}
22UniqueInt64/72.542 GiB/sec2.707 GiB/sec 6.497
{'iterations': 56, 'null_percent': 0.1}
20 UniqueString100bytes/10 22.536 GiB/sec 23.985 GiB/sec 6.432
{'iterations': 40, 'null_percent': 99.0}
35UniqueString10bytes/1 788.817 MiB/sec 836.008 MiB/sec 5.983
{'iterations': 14, 'null_percent': 0.1}
17UniqueString10bytes/7 592.671 MiB/sec 628.054 MiB/sec 5.970
{'iterations': 10, 'null_percent': 0.1}
3 UniqueString10bytes/42.515 GiB/sec2.658 GiB/sec 5.687
{'iterations': 45, 'null_percent': 99.0}
19 UniqueString10bytes/102.402 GiB/sec2.529 GiB/sec 5.269
{'iterations': 42, 'null_percent': 99.0}
9UniqueString100bytes/13.929 GiB/sec4.077 GiB/sec 3.762
{'iterations': 7, 'null_percent': 0.1}
30UniqueString10bytes/8 593.560 MiB/sec 610.253 MiB/sec 2.812
{'iterations': 10, 'null_percent': 1.0}
12UniqueString10bytes/2 788.505 MiB/sec 808.396 MiB/sec 2.523
{'iterations': 14, 'null_percent': 1.0}
37 UniqueString100bytes/81.965 GiB/sec1.998 GiB/sec 1.697
{'iterations': 3, 'null_percent': 1.0}
1UniqueString100bytes/23.984 GiB/sec4.025 GiB/sec 1.028
{'iterations': 7, 'null_percent': 1.0}
36 UniqueString100bytes/34.262 GiB/sec4.293 GiB/sec 0.725
{'iterations': 8, 'null_percent': 10.0}
8 BuildStringDictionary 85.507 MiB/sec 85.687 MiB/sec 0.211
{'iterations': 198}
16 UniqueString100bytes/92.121 GiB/sec2.111 GiB/sec-0.469
{'iterations': 4, 'null_percent': 10.0}
4UniqueString100bytes/62.056 GiB/sec2.043 GiB/sec-0.626
{'iterations': 4, 'null_percent': 0.0}
10UniqueUInt8/3 453.281 MiB/sec 448.407 MiB/sec-1.075
{'iterations': 79, 'null_percent': 10.0}
14 UniqueString100bytes/04.100 GiB/sec4.055 GiB/sec-1.089
{'iterations': 7, 'null_percent': 0.0}
24UniqueInt64/82.473 GiB/sec2.443 GiB/sec-1.202
{'iterations': 55, 'null_percent': 1.0}
26UniqueString10bytes/9 615.880 MiB/sec 608.453 MiB/sec-1.206
{'iterations': 11, 'null_percent': 10.0}
42UniqueString10bytes/6 651.430 MiB/sec 640.128 MiB/sec-1.735
{'iterations': 11, 'null_percent': 0.0}
27UniqueUInt8/01.775 GiB/sec1.738 GiB/sec-2.063
{'iterations': 318, 'null_percent': 0.0}
31UniqueInt64/92.076 GiB/sec2.033 GiB/sec-2.067
{'iterations': 46, 'null_percent': 10.0}
15 B