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https://issues.apache.org/jira/browse/SOLR-18477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18118231#comment-18118231
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Mikhail Khludnev commented on SOLR-18477:
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before
{code}
parser p50 p90 p95 p99 max vs fastest
joinglob 52 68 72 79 99 1.0x
aijoin 183 249 275 328 407 3.5x
{code}
after
{code}
parser p50 p90 p95 p99 max vs fastest
joinglob 50 72 81 101 117 1.0x
aijoin 149 228 249 303 343 3.0x
{code}
ok it's ~10% gain.
> faster intersection, and omit stored fields for auxIndexJoin
> -------------------------------------------------------------
>
> Key: SOLR-18477
> URL: https://issues.apache.org/jira/browse/SOLR-18477
> Project: Solr
> Issue Type: Improvement
> Reporter: Mikhail Khludnev
> Assignee: Mikhail Khludnev
> Priority: Major
>
> There are two hotspots revealed during benchmarking SOLR-18307
> * intersection of the cached from-side query and join-column - it should be
> adaptive leapfrog instead
> * join-index causes a lot of merges, merge spend a lot of time in enumerating
> empty stored fields sic - just introduce a codec without stored fields for
> auxJoinIdex only (can opt out)
> Also add some traces (off by default)
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