Simon Willnauer created LUCENE-8599:
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Summary: Use sparse bitset to store docs in
SingleValueDocValuesFieldUpdates
Key: LUCENE-8599
URL: https://issues.apache.org/jira/browse/LUCENE-8599
Project: Lucene - Core
Issue Type: Improvement
Reporter: Simon Willnauer
Fix For: master (8.0), 7.7
Using a sparse bitset in SingleValueDocValuesFieldUdpates allows storing
which documents have an update much more efficient and prevents the need
to sort the docs array altogether that showed to be a significant bottleneck
in LUCENE-8598. Using the spares bitset yields another 10x performance
improvement
in applying updates versus the changes proposed in LUCENE-8598.
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