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From "Adrien Grand (JIRA)" <>
Subject [jira] [Updated] (LUCENE-2750) add Kamikaze 3.0.1 into Lucene
Date Fri, 12 Jul 2013 19:03:50 GMT


Adrien Grand updated LUCENE-2750:

    Attachment: LUCENE-2750.patch

I wrote an implementation of a PForDeltaDocIdSet based on the ones in Kamikaze and D. Lemire's
JavaFastPFOR (both are licensed under the ASL 2.0).

On the contrary to the original implementation, it uses FOR to encode exceptions (this was
easier given that we already have lots of utility methods to pack integers).
> add Kamikaze 3.0.1 into Lucene
> ------------------------------
>                 Key: LUCENE-2750
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Sub-task
>          Components: modules/other
>            Reporter: hao yan
>            Assignee: Adrien Grand
>         Attachments: LUCENE-2750.patch
>   Original Estimate: 336h
>  Remaining Estimate: 336h
> Kamikaze 3.0.1 is the updated version of Kamikaze 2.0.0. It can achieve significantly
better performance then Kamikaze 2.0.0 in terms of both compressed size and decompression
speed. The main difference between the two versions is Kamikaze 3.0.x uses the much more efficient
implementation of the PForDelta compression algorithm. My goal is to integrate the highly
efficient PForDelta implementation into Lucene Codec.

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