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https://issues.apache.org/jira/browse/LUCENE-1410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973021#action_12973021
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Paul Elschot commented on LUCENE-1410:
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bq. ... separately encode exc positions & values (high bits), leaving low bits
in the slot. Does this give better perf than linking them together? (I think
pfor1 links).
This saves forced exceptions for low numbers of frame bits, so the treatment of
exceptions is cleaner.
bq. Simple16 cannot represent values >= 2^28?
A simple solution is to treat the high bit of the 28 bit value just the same as
in vByte, and allow a vByte to follow in the 28 bit case. The high bit can also
be added to the selector easily to avoid testing for it.
> 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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