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From "Robert Muir (JIRA)" <>
Subject [jira] Commented: (LUCENE-2735) First Cut at GroupVarInt with FixedIntBlockIndexInput / Output
Date Wed, 03 Nov 2010 12:51:24 GMT


Robert Muir commented on LUCENE-2735:

bq. (in contrib/instantiated which, somehow, is really good at finding sneaky codec problems!).

we should really try to 'capture' the logic this thing uses, in the core tests.
I assume its TestIndicesEquals?

Maybe we can write a similar test: build two "equivalent" indexes (one with TestExternalCodecs.RAMOnlyCodec?)
and compare them like this test does.

> 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
>            Assignee: Simon Willnauer
>            Priority: Minor
>             Fix For: 4.0
>         Attachments: LUCENE-2735.patch, 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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