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https://issues.apache.org/jira/browse/LUCENE-10125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17421456#comment-17421456
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ASF subversion and git services commented on LUCENE-10125:
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Commit 9f80b4d8fbd5ef514e833adb13959dc0bcdaf2a8 in lucene's branch
refs/heads/main from Adrien Grand
[ https://gitbox.apache.org/repos/asf?p=lucene.git;h=9f80b4d ]
LUCENE-10125: Speed up computation of exceptions. (#322)
Even though it was not the driver for the slowdown, in LUCENE-10125 we
identified that the move to PFOR had slowed down indexing significantly
for fields indexed with indexOptions=DOCS. This patch gets some of the
peformance back by using the `LongHeap` that we introduced for vectors
instead of sorting the same array over and over again.
On the NYC Taxis benchmark, I observed ~8% faster merges of postings
with this change.
> Investigate indexing throughput regression on NYC Taxis between 2021-04-12
> and 2021-05-24
> -----------------------------------------------------------------------------------------
>
> Key: LUCENE-10125
> URL: https://issues.apache.org/jira/browse/LUCENE-10125
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-10125_hack.patch
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> There's been a significant drop in indexing throughput between 2021-04-12 and
> 2021-05-24 on the NYC Taxis benchmark. Unfortunately several suspects have
> been merged during that period of time so we might need to git bisect to
> figure out which one is responsible for the regression. Interestingly the
> sorted index looks less affected than the non-sorted indexes.
> https://home.apache.org/~mikemccand/lucenebench/sparseResults.html#index_throughput
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