MassivePizza commented on PR #23609:
URL: https://github.com/apache/datafusion/pull/23609#issuecomment-5001495326
Only getting noise locally. I don't think my changes should affect "no TopK"
regardless.
```
distinct 10000000 rows desc [no TopK]
time: [29.979 ms 30.184 ms 30.388 ms]
change: [−0.4089% +0.4916% +1.3107%] (p = 0.27 >
0.05)
No change in performance detected.
distinct 10000000 rows asc [no TopK]
time: [30.436 ms 30.733 ms 31.053 ms]
change: [+1.5647% +2.7108% +3.9667%] (p = 0.00 <
0.05)
Performance has regressed.
Found 6 outliers among 100 measurements (6.00%)
5 (5.00%) high mild
1 (1.00%) high severe
distinct 10000000 rows desc [TopK]
time: [4.5273 ms 4.5704 ms 4.6145 ms]
change: [−23.068% −22.347% −21.532%] (p = 0.00 <
0.05)
Performance has improved.
Found 1 outliers among 100 measurements (1.00%)
1 (1.00%) high mild
distinct 10000000 rows asc [TopK]
time: [4.3722 ms 4.3967 ms 4.4224 ms]
change: [−25.664% −24.988% −24.372%] (p = 0.00 <
0.05)
Performance has improved.
Found 3 outliers among 100 measurements (3.00%)
2 (2.00%) high mild
1 (1.00%) high severe
```
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