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https://issues.apache.org/jira/browse/SOLR-15185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17291393#comment-17291393
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David Smiley commented on SOLR-15185:
-------------------------------------

I'm really glad to hear you like it!  No rush... but I do want to remove all 
Query usages of Filter for 9.0, and ideally remove Filter entirely if I have 
time/help.

> Improve "hash" QParser
> ----------------------
>
>                 Key: SOLR-15185
>                 URL: https://issues.apache.org/jira/browse/SOLR-15185
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: David Smiley
>            Assignee: David Smiley
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> * Don't use Filter (to be removed)
> * Do use TwoPhaseIterator, not PostFilter
> * Don't pre-compute matching docs (wasteful)
> * Support more fields, and more field types
> * Faster hash on Strings (avoid Char conversion)
> * Stronger hash when using multiple fields



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