Hoss Man created SOLR-7239:
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             Summary: 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


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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