vsop-479 commented on PR #14371:
URL: https://github.com/apache/lucene/pull/14371#issuecomment-2774626745

   @gf2121 , I measured it on a linux server (`uses preferredBitSize=512; FMA 
enabled`), there is still a massive slowndown. I will dig more ...
   
   ```
   Benchmark                                       Mode  Cnt    Score   Error   
Units
   AdvanceSparseDISIBenchmark.advance             thrpt   15  386.100 ± 0.162  
ops/ms
   AdvanceSparseDISIBenchmark.advanceVector       thrpt   15  162.697 ± 0.581  
ops/ms
   AdvanceSparseDISIBenchmark.advanceExact        thrpt   15  437.998 ± 0.644  
ops/ms
   AdvanceSparseDISIBenchmark.advanceExactVector  thrpt   15  271.823 ± 0.625  
ops/ms
   ```


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