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Posted to commits@pinot.apache.org by GitBox <gi...@apache.org> on 2021/09/27 21:47:31 UTC
[GitHub] [pinot] richardstartin removed a comment on pull request #7487: use MethodHandle to access vectorized unsigned comparison on JDK9+
richardstartin removed a comment on pull request #7487:
URL: https://github.com/apache/pinot/pull/7487#issuecomment-928305819
Here are some numbers from `BenchmarkStringDictionary` which hits `ByteArray.compare` twice on the write path but not on the read path. I threw away the number for the off-heap dictionary because they are noisy, and used a fixed seed so subsequent runs are comparable - this change looks worthwhile.
```
Benchmark (_maxValueLength) (_seed) Mode Cnt Score Error Units
BenchmarkStringDictionary.onHeapStringDictionaryRead 8 2021 avgt 15 39.954 ± 2.446 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 16 2021 avgt 15 49.021 ± 10.705 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 32 2021 avgt 15 48.543 ± 12.200 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 64 2021 avgt 15 53.494 ± 7.755 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 128 2021 avgt 15 68.075 ± 15.418 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 256 2021 avgt 15 66.177 ± 5.318 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 512 2021 avgt 15 68.576 ± 1.738 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 1024 2021 avgt 15 70.257 ± 7.173 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 8 2021 avgt 15 117.377 ± 5.491 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 16 2021 avgt 15 115.491 ± 8.360 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 32 2021 avgt 15 116.254 ± 14.534 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 64 2021 avgt 15 120.159 ± 8.665 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 128 2021 avgt 15 142.495 ± 12.102 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 256 2021 avgt 15 196.842 ± 12.584 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 512 2021 avgt 15 210.740 ± 16.198 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 1024 2021 avgt 15 229.852 ± 16.526 ms/op
Benchmark (_maxValueLength) (_seed) Mode Cnt Score Error Units
BenchmarkStringDictionary.onHeapStringDictionaryRead 8 2021 avgt 15 38.390 ± 2.110 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 16 2021 avgt 15 39.827 ± 7.020 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 32 2021 avgt 15 46.284 ± 12.710 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 64 2021 avgt 15 58.891 ± 11.733 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 128 2021 avgt 15 56.999 ± 3.481 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 256 2021 avgt 15 68.284 ± 3.805 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 512 2021 avgt 15 68.878 ± 1.086 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryRead 1024 2021 avgt 15 75.076 ± 1.144 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 8 2021 avgt 15 100.520 ± 5.884 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 16 2021 avgt 15 108.455 ± 4.986 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 32 2021 avgt 15 107.341 ± 5.383 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 64 2021 avgt 15 113.251 ± 4.794 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 128 2021 avgt 15 122.947 ± 5.376 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 256 2021 avgt 15 154.681 ± 4.031 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 512 2021 avgt 15 152.651 ± 6.078 ms/op
BenchmarkStringDictionary.onHeapStringDictionaryWrite 1024 2021 avgt 15 151.176 ± 5.072 ms/op
```
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