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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