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