kkewwei created LUCENE-9645:
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Summary: Delete useless negativeDeltas in BKDReader$IndexTree
Key: LUCENE-9645
URL: https://issues.apache.org/jira/browse/LUCENE-9645
Project: Lucene - Core
Issue Type: Improvement
Components: core/other
Affects Versions: 8.6.2
Reporter: kkewwei
In `BKDReader$IndexTree`, `negativeDeltas` seems useless. it will be only be
used in `BKDReader.readNodeData()`, we use `negativeDeltas[level * numIndexDims
+ splitDim]` to check whether the current nod is left or right, but it can be
replaced by `isLeft`.
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