GeorryHuang opened a new pull request #2741:
URL: https://github.com/apache/hbase/pull/2741
…he double comparison process
There is a TODO like this "TODO: Redo so only a single pass over the arrays
rather than one to compare and then a second composing midpoint." in
getMidpoint() of class HFileWriteImpl
The old logic compares the left byte array and the right byte array twice：
1. A comparison is performed before composing MinimumMidpointArray
2. During composing of MinimumMidpointArray, bytes were comparing again
My optimization combines them into one
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