rmuir commented on pull request #308:
URL: https://github.com/apache/lucene/pull/308#issuecomment-922893171


   > OutputStreamIndexOutput should be looked at a separate issue.
   
   I'm not sure about this: doesn't seem like the right tradeoff. Would 
certainly make the code here more complicated due to the way we use JDK 
outputstream decorators for both buffering and checksum. I'd hate to see that 
logic duplicated unless there's a real benchmarking showing real indexing 
improvement (JMH doesn't count here).
   
   If we want to reduce the overhead of this packing/unpacking during indexing, 
maybe it is best to start with the jazillion of complicated byte[] buffers in 
indexwriter (byteblockpool, pagedbytes, ...). There are so many of these...


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