uschindler commented on issue #12531:
URL: https://github.com/apache/lucene/issues/12531#issuecomment-1704969493

   Lucene does not use threads during searching internally, everything is 
sequential. IndexReader is using Executors, but actually there is no reason to 
NOT use virtual threads.
   
   The issue mentioned above is about disk IO, which is a different story. As 
Lucene uses preferably MMAP to access disks theres no way to make this async. 
It would need a complete rewrite of all Lucene internals, so this is not 
working in the basic design (and also not needed). Lucene is mostly CPU 
intensive operations, disk IO is not really part of the API layer.
   
   This issue is possibly won't fix.


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