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From "Michael McCandless (JIRA)" <>
Subject [jira] Updated: (LUCENE-2735) First Cut at GroupVarInt with FixedIntBlockIndexInput / Output
Date Tue, 02 Nov 2010 21:09:08 GMT


Michael McCandless updated LUCENE-2735:

    Attachment: LUCENE-2735.patch

I made a codec for GVint (attached) but a few tests fail with spooky exceptions, eg TestPhraseQuery.testRandomPhrases
and TestCodecs.testRandomPostings and TestIndicesEquals.testInstantiatedIndexWriter (in contrib/instantiated
which, somehow, is really good at finding sneaky codec problems!).

> First Cut at GroupVarInt with FixedIntBlockIndexInput / Output
> --------------------------------------------------------------
>                 Key: LUCENE-2735
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>    Affects Versions: 4.0
>            Reporter: Simon Willnauer
>            Priority: Minor
>             Fix For: 4.0
>         Attachments: LUCENE-2735.patch, LUCENE-2735.patch, LUCENE-2735_alt.patch
> I have hacked together a FixedIntBlockIndex impl with Group VarInt encoding - this does
way worse than standard codec in benchmarks but I guess that is mainly due to the FixedIntBlockIndex
limitations. Once LUCENE-2723 is in / or builds with trunk again I will update and run some
tests. The isolated microbenchmark shows that there could be improvements over vint even in
java though and I am sure we can make it faster impl. wise.

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