jpountz commented on PR #14896: URL: https://github.com/apache/lucene/pull/14896#issuecomment-3038878223
FYI I played with an alternative impl that is branchless, partially auto-vectorizes, and seems to give almost the same performance as the vectorized impl on my machine (which doesn't have AVX-512, so the gap may be bigger on your machine). ``` Benchmark (minScoreInclusive) (size) Mode Cnt Score Error Units CompetitiveBenchmark.baseline 0 128 thrpt 5 16580.322 ± 544.820 ops/ms CompetitiveBenchmark.baseline 0.2 128 thrpt 5 3135.744 ± 16.845 ops/ms CompetitiveBenchmark.baseline 0.4 128 thrpt 5 1919.107 ± 16.555 ops/ms CompetitiveBenchmark.baseline 0.5 128 thrpt 5 1787.012 ± 44.708 ops/ms CompetitiveBenchmark.baseline 0.8 128 thrpt 5 3533.556 ± 43.427 ops/ms CompetitiveBenchmark.branchlessCandidate 0 128 thrpt 5 16991.935 ± 1305.993 ops/ms CompetitiveBenchmark.branchlessCandidate 0.2 128 thrpt 5 8585.819 ± 376.521 ops/ms CompetitiveBenchmark.branchlessCandidate 0.4 128 thrpt 5 8564.359 ± 275.025 ops/ms CompetitiveBenchmark.branchlessCandidate 0.5 128 thrpt 5 8783.434 ± 84.353 ops/ms CompetitiveBenchmark.branchlessCandidate 0.8 128 thrpt 5 8808.948 ± 64.613 ops/ms CompetitiveBenchmark.vectorizedCandidate 0 128 thrpt 5 9913.819 ± 34.008 ops/ms CompetitiveBenchmark.vectorizedCandidate 0.2 128 thrpt 5 9963.308 ± 897.262 ops/ms CompetitiveBenchmark.vectorizedCandidate 0.4 128 thrpt 5 9743.768 ± 461.215 ops/ms CompetitiveBenchmark.vectorizedCandidate 0.5 128 thrpt 5 9851.264 ± 200.810 ops/ms CompetitiveBenchmark.vectorizedCandidate 0.8 128 thrpt 5 10043.750 ± 91.672 ops/ms ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org
