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https://issues.apache.org/jira/browse/LUCENE-8599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16718711#comment-16718711
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ASF subversion and git services commented on LUCENE-8599:
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Commit 61e448666d56c20c37dfb825ec14ffe697d000ff in lucene-solr's branch
refs/heads/jira/http2 from [~simonw]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=61e4486 ]
LUCENE-8599: Add hasNoValue bitset to ramBytesUsed calculation
> 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: 50m
> 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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