cxzl25 commented on PR #4480:
URL: https://github.com/apache/hadoop/pull/4480#issuecomment-1164455182

   > Thanks @cxzl25 for your patch. I have a question about it and looking 
forward your feedback. Can this change improve the namenode performance? I see 
that some places specially remove this judgment, and use log.info("{}", XXX) 
replace it.
   > 
   > Or can you do some performance test for it? use this judgment or not.
   
   We have some JIRAs that use the `isDebugEnabled` judgment.
   At the beginning, I found that the log of `Removing stale replica` has 
meaningless string splicing, and using `NameNode.blockStateChangeLog` can be 
replaced by `blockLog`, because this debug-level log is called a lot every day.
   So I fixed the other problems by the way.


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