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Posted to issues@carbondata.apache.org by GitBox <gi...@apache.org> on 2019/08/12 09:10:13 UTC

[GitHub] [carbondata] vikramahuja1001 opened a new pull request #3354: [CARBONDATA-3489] Optimized the comparator instances in sort

vikramahuja1001 opened a new pull request #3354: [CARBONDATA-3489] Optimized the comparator instances in sort
URL: https://github.com/apache/carbondata/pull/3354
 
 
   [CARBONDATA-3489] Optimized the comparator instances in sort
   
   Root cause: In case of sorting in the comparator classes(NewRowComparator, RawRowComparator, IntermediateSortTempRowComparator and  UnsafeRowComparator) a new SerializableComparator object is been created in the compare method everytime two objects are passed for comparison.
   
   Solution: We can reduce the number of SerializeableComparator objects that are been created by storing the SerializeableComparators of primitive datatypes  in a map and getting it from the map instead of creating a new SerializeableComparator everytime.
   Be sure to do all of the following checklist to help us incorporate 
   your contribution quickly and easily:
   
    - [ ] Any interfaces changed? NA
    
    - [ ] Any backward compatibility impacted? NA
    
    - [ ] Document update required? NA
   
    - [ ] Testing done
           Please provide details on 
           - Whether new unit test cases have been added or why no new tests are required?
           - How it is tested? Please attach test report.
           - Is it a performance related change? Please attach the performance test report.
           - Any additional information to help reviewers in testing this change.
          
    - [ ] For large changes, please consider breaking it into sub-tasks under an umbrella JIRA. 
   
   

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