[
https://issues.apache.org/jira/browse/LUCENE-7071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15184049#comment-15184049
]
ASF subversion and git services commented on LUCENE-7071:
---------------------------------------------------------
Commit 549e6d7c497b1da0368f012ef0a2521cf0548582 in lucene-solr's branch
refs/heads/branch_6x from Mike McCandless
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=549e6d7 ]
LUCENE-7071: reduce byte copying costs of OfflineSorter
> Can we reeduce excessive byte[] copying in OfflineSorter?
> ---------------------------------------------------------
>
> Key: LUCENE-7071
> URL: https://issues.apache.org/jira/browse/LUCENE-7071
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: master, 6.1
>
> Attachments: LUCENE-7071.patch
>
>
> OfflineSorter, which dimensional points uses heavily in the > 1D case,
> works by reading one partition, a set of N unsorted values, from disk
> and sorting it in memory and writing it out again.
> The sort invokes a provided {{Comparator}} on two {{BytesRef}} values,
> each of which is fully copied from the {{ByteBlockPool}}, when it could
> often reference a slice from the pool instead.
> Another byte[] copy happens when iterating through the sorted values.
> This is an optimization ... I'm targeting 6.1.0 not 6.0.0!
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
