Adrien Grand created LUCENE-7501:
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Summary: Do not encode the split dimension in the index in the 1D
case
Key: LUCENE-7501
URL: https://issues.apache.org/jira/browse/LUCENE-7501
Project: Lucene - Core
Issue Type: Improvement
Reporter: Adrien Grand
Assignee: Adrien Grand
Priority: Minor
When there is a single dimension, the split dimension is always 0, so we do not
need to encode it in the index of the BKD tree. This would be 33% memory saving
for half floats, 20% for ints/floats, 11% for longs/doubles and 6% for ip
addresses.
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