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https://issues.apache.org/jira/browse/LUCENE-5809?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir resolved LUCENE-5809.
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Resolution: Fixed
Fix Version/s: 4.10
5.0
> Simplify ExactPhraseScorer
> --------------------------
>
> Key: LUCENE-5809
> URL: https://issues.apache.org/jira/browse/LUCENE-5809
> Project: Lucene - Core
> Issue Type: Task
> Components: core/search
> Reporter: Robert Muir
> Fix For: 5.0, 4.10
>
> Attachments: LUCENE-5809.patch
>
>
> While looking at this scorer i see a few little things which are remnants of
> the past:
> * crazy heuristics to use next() over advance(): I think it should just use
> advance(), like conjunctionscorer. these days advance() isnt stupid anymore
> * incorrect leapfrogging. the lead scorer is never advanced if a subsequent
> scorer goes past it, it just falls into this nextDoc() loop.
> * pre-next()'ing: we are using cost() api to sort, so there is no need to do
> that.
> * UnionDocsAndPositionsEnum doesnt follow docsenum contract and set initial
> doc to -1
> * postingsreader advance() doesnt need to check docFreq > BLOCK_SIZE on each
> advance call, thats easy to remove.
> So I think really this scorer should just look like "conjunctionscorer that
> verifies positions on match".
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