jpountz commented on PR #14896:
URL: https://github.com/apache/lucene/pull/14896#issuecomment-3039797793

   I get the following results on an Apple M3 (ARM). The vectorized 
implementation is 10x slower than the scalar impls.
   
   ```
   Benchmark                                 (minScoreInclusive)  (size)   Mode 
 Cnt      Score      Error   Units
   CompetitiveBenchmark.baseline                               0     128  thrpt 
   5  39680,991 ± 1331,474  ops/ms
   CompetitiveBenchmark.baseline                             0.2     128  thrpt 
   5  12341,873 ± 2689,119  ops/ms
   CompetitiveBenchmark.baseline                             0.4     128  thrpt 
   5  11486,998 ± 1605,569  ops/ms
   CompetitiveBenchmark.baseline                             0.5     128  thrpt 
   5  12114,898 ± 1071,809  ops/ms
   CompetitiveBenchmark.baseline                             0.8     128  thrpt 
   5  17948,458 ± 2517,146  ops/ms
   CompetitiveBenchmark.branchlessCandidate                    0     128  thrpt 
   5  36995,216 ± 1933,371  ops/ms
   CompetitiveBenchmark.branchlessCandidate                  0.2     128  thrpt 
   5  10730,098 ±  322,258  ops/ms
   CompetitiveBenchmark.branchlessCandidate                  0.4     128  thrpt 
   5  11226,245 ±  124,199  ops/ms
   CompetitiveBenchmark.branchlessCandidate                  0.5     128  thrpt 
   5  11210,890 ±  215,824  ops/ms
   CompetitiveBenchmark.branchlessCandidate                  0.8     128  thrpt 
   5  11154,615 ±  245,362  ops/ms
   CompetitiveBenchmark.vectorizedCandidate                    0     128  thrpt 
   5   1140,617 ±   14,719  ops/ms
   CompetitiveBenchmark.vectorizedCandidate                  0.2     128  thrpt 
   5    994,966 ±   29,994  ops/ms
   CompetitiveBenchmark.vectorizedCandidate                  0.4     128  thrpt 
   5    923,214 ±   90,922  ops/ms
   CompetitiveBenchmark.vectorizedCandidate                  0.5     128  thrpt 
   5    890,464 ±    4,270  ops/ms
   CompetitiveBenchmark.vectorizedCandidate                  0.8     128  thrpt 
   5    950,584 ±    7,772  ops/ms
   ```


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