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https://issues.apache.org/jira/browse/LUCENE-2084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12794701#action_12794701
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Robert Muir commented on LUCENE-2084:
-------------------------------------
Hi, this is a simple, straightforward performance improvement between 10% and
20% on average it looks, with no backwards problems.
What Uwe describes as a problem is not introduced here, but exists already and
is documented as such in the class javadocs, and preserved for backwards
compatibility.
So, I think such backwards-breakage should be under a separate issue.
I will commit this one in a few days if no one objects.
> remove Byte/CharBuffer wrapping for collation key generation
> ------------------------------------------------------------
>
> Key: LUCENE-2084
> URL: https://issues.apache.org/jira/browse/LUCENE-2084
> Project: Lucene - Java
> Issue Type: Improvement
> Components: contrib/*
> Reporter: Robert Muir
> Assignee: Robert Muir
> Priority: Minor
> Fix For: 3.1
>
> Attachments: collation.benchmark.tar.bz2, LUCENE-2084.patch,
> LUCENE-2084.patch, LUCENE-2084.patch, LUCENE-2084.patch,
> TopTFWikipediaWords.tar.bz2
>
>
> We can remove the overhead of ByteBuffer and CharBuffer wrapping in
> CollationKeyFilter and ICUCollationKeyFilter.
> this patch moves the logic in IndexableBinaryStringTools into char[],int,int
> and byte[],int,int based methods, with the previous Byte/CharBuffer methods
> delegating to these.
> Previously, the Byte/CharBuffer methods required a backing array anyway.
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