Adrien Grand created LUCENE-7371:
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Summary: BKDReader could compress values better
Key: LUCENE-7371
URL: https://issues.apache.org/jira/browse/LUCENE-7371
Project: Lucene - Core
Issue Type: Bug
Reporter: Adrien Grand
Assignee: Adrien Grand
Priority: Minor
For compressing values, BKDReader only relies on shared prefixes in a block. We
could probably easily do better. For instance there are only 256 possible
values for the first byte of the dimension that the values are sorted by, yet
we use a block size of 1024. So by using something simple like run-length
compression we could save 6 bits per value on average.
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