coderfender commented on PR #21561:
URL: https://github.com/apache/datafusion/pull/21561#issuecomment-4232538300
Comparison with main
```
group impl_groups
main
----- -----------
----
count_distinct_groups i64 10 groups 1.00
85.6±1.80µs ? ?/sec 4.97 425.0±5.72µs ? ?/sec
count_distinct_groups i64 10 groups (GroupsAccumulator)
1.00 82.6±0.83µs ? ?/sec
count_distinct_groups i64 100 groups 1.00
86.1±1.41µs ? ?/sec 5.18 445.9±5.79µs ? ?/sec
count_distinct_groups i64 100 groups (GroupsAccumulator)
1.00 83.1±1.25µs ? ?/sec
count_distinct_groups i64 1000 groups 1.00
86.7±2.55µs ? ?/sec 7.06 612.7±4.72µs ? ?/sec
count_distinct_groups i64 1000 groups (GroupsAccumulator)
1.00 84.1±2.01µs ? ?/sec
```
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