[FLINK] Replace LinkedList with ArrayDeque and pre-size HashSet in Flink module#11789
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acvictor wants to merge 1 commit into
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[FLINK] Replace LinkedList with ArrayDeque and pre-size HashSet in Flink module#11789acvictor wants to merge 1 commit into
acvictor wants to merge 1 commit into
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This PR is stale because it has been open 45 days with no activity. Remove stale label or comment or this will be closed in 10 days. |
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What changes are proposed in this pull request?
This PR makes minor collection improvements in Flink by replacing
LinkedListwithArrayDequefor the internal row buffer - provides O(1) foraddat tail,remove(0)from head with better cache locality thanLinkedListwhich allocates a separate node object per element, and using pre-sizeHashSetinanalyzeJoinKeysto avoid rehashing when the key count exceeds the default capacity (16 initial capacity x 0.75 load factor = rehash after 12 elements).How was this patch tested?
Existing UTs
Was this patch authored or co-authored using generative AI tooling?
No