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https://issues.apache.org/jira/browse/LUCENE-1410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12637149#action_12637149
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Paul Elschot commented on LUCENE-1410:
--------------------------------------
I can't see the .tgz attachment at the moment.
Very nice table, this java/c++ comparison. Meanwhile I also have a java program
generator for decompression, and I got very similar results.
I found a bug for the 17 bits case in decodeAnyFrame(), this might explain the
sum test failure that you saw.
One detail on the generated code: the final mask can be omitted, for example
the last bit extraction for the 5 bit case:
.bq (i4 >>> 27)
On the java side leaving this last mask out did not make a difference, but it
might be noticeable in c++.
> PFOR implementation
> -------------------
>
> Key: LUCENE-1410
> URL: https://issues.apache.org/jira/browse/LUCENE-1410
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Other
> Reporter: Paul Elschot
> Priority: Minor
> Attachments: LUCENE-1410b.patch, TestPFor2.java, TestPFor2.java,
> TestPFor2.java
>
> Original Estimate: 21840h
> Remaining Estimate: 21840h
>
> Implementation of Patched Frame of Reference.
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