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https://issues.apache.org/jira/browse/LUCENE-8599?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simon Willnauer resolved LUCENE-8599.
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Resolution: Fixed
> 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
> Priority: Major
> Fix For: master (8.0), 7.7
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> 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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