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https://issues.apache.org/jira/browse/LUCENE-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656079#action_12656079
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Michael McCandless commented on LUCENE-1483:
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{quote}
> It would be better to pass the base down to the scorer implementations and
> have them add it on before they call collect(), no?
{quote}
So we'd add Scorer.setDocBase instead?
The only downside I can think of here is that often you will perform the
addition when it wasn't necessary.
Ie, if the score is not competitive at all, then you wouldn't need to create
the full docID and so you'd save one add opcode.
Admittedly, this is a very small (tiny) cost, and I do agree that making
HitCollector know about docBase is really an abstraction violation...
> Change IndexSearcher to use MultiSearcher semantics for multiple subreaders
> ---------------------------------------------------------------------------
>
> Key: LUCENE-1483
> URL: https://issues.apache.org/jira/browse/LUCENE-1483
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 2.9
> Reporter: Mark Miller
> Priority: Minor
> Attachments: LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch,
> LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch,
> LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch
>
>
> FieldCache and Filters are forced down to a single segment reader, allowing
> for individual segment reloading on reopen.
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