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https://issues.apache.org/jira/browse/SOLR-7239?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hoss Man updated SOLR-7239:
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Attachment: SOLR-7324.patch
this patch optimizes away the "none" stat case, as well as caches the min/max
numeric values in a double primitive (the Double object is still used for the
null check in the event that no values exist at all)
> StatsComponent perf improvement for min, max, and situations where all stats
> disabled
> -------------------------------------------------------------------------------------
>
> Key: SOLR-7239
> URL: https://issues.apache.org/jira/browse/SOLR-7239
> Project: Solr
> Issue Type: Improvement
> Reporter: Hoss Man
> Assignee: Hoss Man
> Attachments: SOLR-7324.patch
>
>
> as mentioned in SOLR-6349, when i started doing perf testing of requesting
> individual stats, i noticed that min (and it turns out max) were slower to
> compute then more complex stats like sum & mean.
> While investigating, i realized that we can also optimize the case where a
> stats.field param is specified, but no stats are computed for example:
> stats.field={!min=$doMin}fieldname&doMin=false
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