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https://issues.apache.org/jira/browse/LUCENE-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12657019#action_12657019
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Mark Miller commented on LUCENE-1483:
-------------------------------------
bq. This is very interesting and odd - I can't explain why ord searching w/
fallback is so much faster than current trunk when the number of hits is large
(2M).
I was testing with randomly created data (just random number of digits (2-8),
each digit randomly 0-9) and a lot of what I was doing, straight values seemed
to handily beat straight ords! It depended on how many docs I was making and
how segmented I made it I think. Wasn't very official, and the test was
somewhat short, but I ran it over and over...seemed odd.
> 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, 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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