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https://issues.apache.org/jira/browse/SOLR-15185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17289151#comment-17289151
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Joel Bernstein commented on SOLR-15185:
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This is an awesome ticket. I've been mulling over ways to make this perform
better for a long time but haven't got around to working on it. After I review
the existing implementation again I'll come back with some ideas as well.
> Improve "hash" QParser
> ----------------------
>
> Key: SOLR-15185
> URL: https://issues.apache.org/jira/browse/SOLR-15185
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> 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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