schlosna commented on PR #14678:
URL: https://github.com/apache/lucene/pull/14678#issuecomment-2887624646
Added `BytesRefBenchmark` demonstrating existing `new
BytesRef(CharSequence)` vs. `new BytesRef(String)` demonstrating 2x to 6x
throughput improvement on AMD EPYC 7R13 Processor:
```
# AMD EPYC 7R13 Processor
# JMH version: 1.37
# VM version: JDK 24.0.1, OpenJDK 64-Bit Server VM, 24.0.1+9-FR
# VM invoker:
/home/dev/.gradle/jdks/amazon-corretto-24.0.1.9.1-linux-x64/bin/java
# VM options: -XX:+UseParallelGC -XX:TieredStopAtLevel=1
-XX:ActiveProcessorCount=1 -Dfile.encoding=UTF-8 -Duser.country=US
-Duser.language=en -Duser.variant
# Blackhole mode: compiler (auto-detected, use
-Djmh.blackhole.autoDetect=false to disable)
# Warmup: 3 iterations, 3 s each
# Measurement: 5 iterations, 3 s each
(before)
(after)
bytesRefCharSequence
bytesRefString
Benchmark (length) (type) Mode Cnt Score Error
Score Error Units
BytesRefBenchmark 10 ASCII thrpt 5 75.650 ± 4.078
180.382 ± 7.672 ops/us
BytesRefBenchmark 10 ISO_8859_1 thrpt 5 66.688 ± 3.957
114.655 ± 7.510 ops/us
BytesRefBenchmark 10 UTF_8_BMP thrpt 5 46.678 ± 2.387
77.036 ± 2.484 ops/us
BytesRefBenchmark 10 UTF_16 thrpt 5 26.289 ± 1.376
49.021 ± 1.740 ops/us
BytesRefBenchmark 100 ASCII thrpt 5 9.106 ± 0.487
47.246 ± 1.218 ops/us
BytesRefBenchmark 100 ISO_8859_1 thrpt 5 8.447 ± 0.628
23.809 ± 0.488 ops/us
BytesRefBenchmark 100 UTF_8_BMP thrpt 5 5.129 ± 0.141
10.431 ± 0.336 ops/us
BytesRefBenchmark 100 UTF_16 thrpt 5 2.963 ± 0.127
5.904 ± 0.271 ops/us
BytesRefBenchmark 1000 ASCII thrpt 5 0.917 ± 0.038
5.891 ± 0.428 ops/us
BytesRefBenchmark 1000 ISO_8859_1 thrpt 5 0.830 ± 0.024
1.981 ± 0.077 ops/us
BytesRefBenchmark 1000 UTF_8_BMP thrpt 5 0.468 ± 0.014
0.950 ± 0.057 ops/us
BytesRefBenchmark 1000 UTF_16 thrpt 5 0.298 ± 0.011
0.537 ± 0.021 ops/us
```
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