albertlockett commented on PR #9322:
URL: https://github.com/apache/arrow-rs/pull/9322#issuecomment-3831084865
Benchmark results:
Before:
```
$ cargo bench --bench null_dict -- "null_dict"
null_dict/len=128 time: [132.45 ns 133.37 ns 134.59 ns]
null_dict/len=1536 time: [617.78 ns 623.39 ns 628.47 ns]
null_dict/len=8092 time: [2.9991 µs 3.0252 µs 3.0480 µs]
```
After:
```
$ cargo bench --bench null_dict -- "null_dict"
null_dict/len=128 time: [97.779 ns 98.222 ns 98.719 ns]
change: [−26.268% −25.659% −25.042%] (p = 0.00 <
0.05)
Performance has improved.
null_dict/len=1536 time: [282.86 ns 286.11 ns 289.03 ns]
change: [−59.303% −57.361% −55.406%] (p = 0.00 <
0.05)
Performance has improved.
null_dict/len=8092 time: [1.0559 µs 1.0719 µs 1.0874 µs]
change: [−68.379% −66.573% −65.001%] (p = 0.00 <
0.05)
Performance has improved.
```
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