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[GitHub] [spark] allisonwang-db opened a new pull request, #36837: [SPARK-39441][SQL] Speed up DeduplicateRelations
allisonwang-db opened a new pull request, #36837:
URL: https://github.com/apache/spark/pull/36837
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### What changes were proposed in this pull request?
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This PR improves the performance of the Analyzer rule `DeduplicateRelations`. It removes the new HashSet created by each recursive call and uses a global HashSet to keep track of the visited relations.
### Why are the changes needed?
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Improve Analyzer performance. Here is the result of TPCDSQuerySuite:
```
// Before this PR
org.apache.spark.sql.catalyst.analysis.DeduplicateRelations 269181786 / 1028666896 124 / 1302
// After this PR
org.apache.spark.sql.catalyst.analysis.DeduplicateRelations 144507333 / 643810447 124 / 1302
```
### Does this PR introduce _any_ user-facing change?
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No
### How was this patch tested?
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Existing unit tests.
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[GitHub] [spark] allisonwang-db commented on pull request #36837: [SPARK-39441][SQL] Speed up DeduplicateRelations
Posted by GitBox <gi...@apache.org>.
allisonwang-db commented on PR #36837:
URL: https://github.com/apache/spark/pull/36837#issuecomment-1154536858
@LuciferYang I am running on M1 as well. Indeed the runtime for the TPCDSQuerySuite can vary over the runs.
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[GitHub] [spark] LuciferYang commented on pull request #36837: [SPARK-39441][SQL] Speed up DeduplicateRelations
Posted by GitBox <gi...@apache.org>.
LuciferYang commented on PR #36837:
URL: https://github.com/apache/spark/pull/36837#issuecomment-1153836826
```
// Before this PR
org.apache.spark.sql.catalyst.analysis.DeduplicateRelations 269181786 / 1028666896 124 / 1302
// After this PR
org.apache.spark.sql.catalyst.analysis.DeduplicateRelations 144507333 / 643810447 124 / 1302
```
Is the result generated by GA? The result of running on Apple Slicon is not obvious:
```
// Before this PR
org.apache.spark.sql.catalyst.analysis.DeduplicateRelations 160016165 / 616311392 124 / 1302
// After this PR
org.apache.spark.sql.catalyst.analysis.DeduplicateRelations 142171253 / 605930543 124 / 1302
```
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[GitHub] [spark] allisonwang-db commented on pull request #36837: [SPARK-39441][SQL] Speed up DeduplicateRelations
Posted by GitBox <gi...@apache.org>.
allisonwang-db commented on PR #36837:
URL: https://github.com/apache/spark/pull/36837#issuecomment-1154536909
cc @cloud-fan
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[GitHub] [spark] cloud-fan commented on pull request #36837: [SPARK-39441][SQL] Speed up DeduplicateRelations
Posted by GitBox <gi...@apache.org>.
cloud-fan commented on PR #36837:
URL: https://github.com/apache/spark/pull/36837#issuecomment-1154563272
thanks, merging to master!
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[GitHub] [spark] cloud-fan closed pull request #36837: [SPARK-39441][SQL] Speed up DeduplicateRelations
Posted by GitBox <gi...@apache.org>.
cloud-fan closed pull request #36837: [SPARK-39441][SQL] Speed up DeduplicateRelations
URL: https://github.com/apache/spark/pull/36837
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