peel off special case for 1 dimensional groupby#7777
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Jackie-Jiang merged 1 commit intoapache:masterfrom Nov 18, 2021
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peel off special case for 1 dimensional groupby#7777Jackie-Jiang merged 1 commit intoapache:masterfrom
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...n/java/org/apache/pinot/core/query/aggregation/groupby/DictionaryBasedGroupKeyGenerator.java
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Should we consider using BitSet to replace this boolean array?
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No it’s not a good idea because it creates data dependencies between any contiguous set of 64 groups as they all need to update the same word. I tried it and it was about 30% worse.
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Does this PR prevent a zero down-time upgrade? (Assume upgrade order: Controller, Broker, Server, Minion)
backward-incompat, and complete the section below on Release Notes)Does this PR fix a zero-downtime upgrade introduced earlier?
backward-incompat, and complete the section below on Release Notes)Does this PR otherwise need attention when creating release notes? Things to consider:
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