uschindler commented on PR #12841:
URL: https://github.com/apache/lucene/pull/12841#issuecomment-1867866005

   > Change looks good to me, thanks for running the micro benchmarks again.
   > 
   > I was thinking we'd backport this to 9.x, since this doesn't look like it 
would break anything. This would also help nightly benchmarks stay more in line 
with the stable branch. No strong feelings though, if @uschindler likes it 
better as a 10.0 only change, that's fine with me.
   
   I think you're right. My problem was that the MMapDirectory changes 
regarding the ByteBufferIndexInput impl and NIOFSDir may be slower on 11. As we 
backed out those changes, I see no reason not to backport it. If somebody uses 
memory segments he she is already on java 19+.
   
   I'd still like to check perf of the other changes on java 11 (ByteBuffers)!
   
   Anyways, we should stop working on 9.x.
   
   Uwe


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