rmuir commented on issue #15662:
URL: https://github.com/apache/lucene/issues/15662#issuecomment-3891694905

   Here is the file used for profiling tests in `apache/lucene`, where I think 
this thing was born from
   
   
https://github.com/apache/lucene/blob/4b5105e16798daec9f68ac333661efe1eb6d867b/gradle/testing/profiling.jfc#L18-L41
   
   The `1ms` sampling specified there is much lower than the OpenJDK defaults: 
OpenJDK default is `20ms`. When profiling the tests, the much lower value makes 
sense because you asked it explicitly to profile... it isn't slowing down 
ordinary execution of the tests.
   


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