Noemi Pap-Takacs created IMPALA-11477:
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Summary: Codegen Heapify in SortedRunMerger
Key: IMPALA-11477
URL: https://issues.apache.org/jira/browse/IMPALA-11477
Project: IMPALA
Issue Type: Improvement
Components: Backend
Reporter: Noemi Pap-Takacs
SortedRunMerger is used to merge multiple, already sorted runs. It is used for
external merge in the sorter (SortNode, PartialSortNode and TopNNode), and in
KRPC data stream receiver (ExchangeNode).
SortedRunMerger builds and maintains a min heap of the sorted input runs.
Codegening this Heapify function and the comparator could improve the
performance of the merger.
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