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https://issues.apache.org/jira/browse/LUCENE-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-1483:
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Attachment: LUCENE-1483.patch
OK new patch finally:
* Fixed a few small things YourKit uncovered, eg the private
binarySearch() method was inserting extra run-time access check
method so I changed it to package protected.
* I changed ComparatorPolicy.nextComparator -> nextReader, making it
that method's job to possibly switch comparators as well as call
setNextReader internally. This allows us to pass in the
sub-reader when we init a new comparator.
* Improved TestStressSort some more.
* I made a new ORDDEM2 that does not convert slots when comparing,
but does convert the bottom slot. So it uses ORD in
compareBottom, and ORD comparison between slots if the slots have
the same gen, else compare-by-value. Also, when converting, it
bounds the binarySearch by using bottomOrd. This seems to give
better performance in the high-segment-count, large-queue-size,
few hits cases, and comparable performance in other cases.
I think for a custom sort we should allow user to pass in a ComparatorPolicy?
> Change IndexSearcher multisegment searches to search each individual segment
> using a single HitCollector
> --------------------------------------------------------------------------------------------------------
>
> 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-partial.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,
> 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, sortBench.py, sortCollate.py
>
>
> FieldCache and Filters are forced down to a single segment reader, allowing
> for individual segment reloading on reopen.
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