[IOTDB-1113] Optimize the execution efficiency of UDF#2511
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JackieTien97 merged 20 commits intoapache:masterfrom Jan 21, 2021
Merged
[IOTDB-1113] Optimize the execution efficiency of UDF#2511JackieTien97 merged 20 commits intoapache:masterfrom
JackieTien97 merged 20 commits intoapache:masterfrom
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…rialization process caused by the unclear semantic of setEvictionUpperBound
…erializableRowRecordList
…ts DirectAlignByTimeDataSet, UDFInputDataSet
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Performance report: Data: root.sg.d.s1, INT32, 100 000 000 points
After optimization, the execution time of the do_nothing function is reduced by (76446-35547) / 76446 = 53.5%. |
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There are several points that can be optimized:
Avoid Java boxing / unboxing in LRUCache and SafetyLine
Avoid unnecessary memory copy in SerializableRowReordList
Memory control:
3.1 Disable memory control when there are no text fields
3.2 Stricter eviction upper bound
Use lighter data structures: RowRecord -> Object[]
JIRA: https://issues.apache.org/jira/browse/IOTDB-1113