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From "Paul Elschot (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1410) PFOR implementation
Date Wed, 22 Dec 2010 18:08:04 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12974307#action_12974307
] 

Paul Elschot commented on LUCENE-1410:
--------------------------------------

bq. I've tested everything I can think of and it seems this nio ByteBuffer/IntBuffer approach
is always the fastest ...

Did you also test without a copy (without the readbytes() call) into the underlying byte array
for the IntBuffer? That might be even faster,
and it could be possible when using for example a BufferedIndexInput or an MMapDirectory.
For decent buffer.get() speed the starting byte would need to be aligned at an int border.



> PFOR implementation
> -------------------
>
>                 Key: LUCENE-1410
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1410
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Index
>            Reporter: Paul Elschot
>            Priority: Minor
>             Fix For: Bulk Postings branch
>
>         Attachments: autogen.tgz, for-summary.txt, LUCENE-1410-codecs.tar.bz2, LUCENE-1410.patch,
LUCENE-1410.patch, LUCENE-1410.patch, LUCENE-1410.patch, LUCENE-1410b.patch, LUCENE-1410c.patch,
LUCENE-1410d.patch, LUCENE-1410e.patch, TermQueryTests.tgz, TestPFor2.java, TestPFor2.java,
TestPFor2.java
>
>   Original Estimate: 21840h
>  Remaining Estimate: 21840h
>
> Implementation of Patched Frame of Reference.

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