benwtrent commented on PR #13581:
URL: https://github.com/apache/lucene/pull/13581#issuecomment-2239473886

   OK, I ran this over 500k vectors, merging with 8 threads, flushing every 
10MB. 
   
   Main
   ```
   Force merge done in: 123535 ms
   0.966         1.94   500000  100     16      250     3919    262525  1.00    
post-filter
   ```
   
   this branch:
   ```
   Force merge index in wiki1024en.train-16-250.index
   Force merge done in: 130107 ms
   0.966         1.76   500000  100     16      250     3908    268437  1.00    
post-filter
   ```
   
   So, maybe 5% slower?
   
   @zhaih could you test as well? This change does seem to clean things up a 
bit. It would be worth it if it doesn't significantly slow things down.


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