Speed up LeafCollector#setScorer in TopHitsAggregator#138883
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iverase merged 2 commits intoelastic:mainfrom Dec 2, 2025
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Speed up LeafCollector#setScorer in TopHitsAggregator#138883iverase merged 2 commits intoelastic:mainfrom
iverase merged 2 commits intoelastic:mainfrom
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this commit introduce a wrapper for the Scorable that is shared by all the buckets so we only need to change it in one place when present.
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This is a fix for a performance bug reported in this discuss issue.
In lucene 10.3 there was this change to speed up must not queries. The change has the side effect that we might be calling
LeafCollector#setScorermany more times than before. This is probably ok because it is expected to be a cheap method.TopHitsAggregator contains an implementation of
LeafCollector#setScorerthat can be expensive if the aggregator is part of a multi-bucket aggregator. Whenever we set the scorer we are looping over all buckets to set the scorer.Therefore, this commit proposes to introduce a wrapper for the Scorable that is shared by all the buckets so we only need to change it in one place when present.