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Subject: [GitHub] [flink] liyafan82 opened a new pull request #8278:
 [FLINK-12335][Table-runtime]Improvement the performance of class SegmentsUtil
Message-ID: <155627314680.11403.6361856246358416239.gitbox@gitbox.apache.org>
Date: Fri, 26 Apr 2019 10:05:46 -0000
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liyafan82 opened a new pull request #8278: [FLINK-12335][Table-runtime]Improvement the performance of class SegmentsUtil
URL: https://github.com/apache/flink/pull/8278
 
 
   …entsUtil
   
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   ## What is the purpose of the change
   
   Improve the performance of SegmentsUtil class :
   
   To evaluate the offset, an integer is bitand with a mask to clear to low bits, and then shift right. The bitand is useless:
   ((index & BIT_BYTE_POSITION_MASK) >>> 3)
   
   
   ## Brief change log
   
     - Change class SegmentsUtil to fix the above 2 issues.
   
   ## Verifying this change
   
   Verified by manually running existing test cases.
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (no)
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no)
     - The serializers: (no)
     - The runtime per-record code paths (performance sensitive): (yes)
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
     - The S3 file system connector: (no)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (no)
     
   

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