msokolov commented on PR #15430:
URL: https://github.com/apache/lucene/pull/15430#issuecomment-3597005151

   luceneutil results from one run with 10MM cohere 768-dim wiki documents:
   
   ```
   recall  latency(ms)  netCPU  avgCpuCount  visited  index(s)  index_docs/s  
force_merge(s)  index_size(MB)  bp-reorder
    0.923        3.350   3.338        0.996     5990   2754.51       3630.41    
     2283.57        15169.98       false
    0.921        3.052   3.042        0.997     5691   2858.65       3498.15    
     4312.79        15123.17        true
   ```
   
   It's a little surprising we see recall changes, since the graphs should be 
the same, merely reordered? They seem to be sometimes worse, sometimes better, 
and never more than about 0.002 different


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