uschindler commented on PR #12417:
URL: https://github.com/apache/lucene/pull/12417#issuecomment-1628999019

   Hi,
   what I figured out with performance testing is the following: When you use 
default settings it doe snot run enough queries by default and instead repeats 
the whole JVM startup several times (i think 20 times). Because the 
optimizations of hotspot are quite slow and at beginning the code creates many 
object instances on heap so GC runs extensively, so you need to tune the 
settings a bit:
   - use huge dataset (wikimedium is ok, but needs more queries)
   - use many queries per run
   - reduce number of JVM startups (5 should be enough)
   
   Uwe


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