woudygao opened a new pull request #24494: SPARK-27586: Improve binary 
comparison: replace Scala's for-comprehen…
URL: https://github.com/apache/spark/pull/24494
 
 
   …sion if statements with while loop
   
   replace for-comprehension if statement with while loop to gain better 
performance in TypeUtils.compareBinary
   
   add UT to test old version and new version comparison result
   
   the perf result is attached to the jira issue
   

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