liyafan82 commented on issue #8773: [FLINK-12879][Table SQL / Runtime] Improve 
the performance of AbstractBinaryWriter
URL: https://github.com/apache/flink/pull/8773#issuecomment-506638490
 
 
   > Thanks @liyafan82 , the reason why copy data to tmp byte[] is that 
`SegmentsUtil.getByte` has poor performance. The simple getByte shouldn't be so 
many codes.
   > So my judgement is: copy bytes should quicker.
   
   @JingsongLi 
   Thanks for the clarification. 
   I should have thought more about it before submitting this PR.

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