neilconway commented on PR #21037:
URL: https://github.com/apache/datafusion/pull/21037#issuecomment-4084541694
```
┌───────────────────────┬───────────┬──────────┬───────────┐
│ Case │ Before │ After │ Change │
├───────────────────────┼───────────┼──────────┼───────────┤
│ i64 80% distinct │ 5.87 µs │ 5.92 µs │ no change │
├───────────────────────┼───────────┼──────────┼───────────┤
│ utf8 80% distinct │ 120.16 µs │ 17.94 µs │ -85.1% │
├───────────────────────┼───────────┼──────────┼───────────┤
│ utf8view 80% distinct │ 125.28 µs │ 20.43 µs │ -83.8% │
├───────────────────────┼───────────┼──────────┼───────────┤
│ i64 99% distinct │ 5.84 µs │ 5.88 µs │ no change │
├───────────────────────┼───────────┼──────────┼───────────┤
│ utf8 99% distinct │ 120.41 µs │ 17.96 µs │ -85.1% │
├───────────────────────┼───────────┼──────────┼───────────┤
│ utf8view 99% distinct │ 125.22 µs │ 20.39 µs │ -83.7% │
└───────────────────────┴───────────┴──────────┴───────────┘
```
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