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From Simon Willnauer <>
Subject Re: lucene 4.0 release date
Date Mon, 08 Nov 2010 07:11:07 GMT
Li Li,

there is no official / unofficial release date for lucene 4.0 if you
want to use the latest and greatest features you need to checkout
trunk of use a nightly build. My guess would be that there is at least
6 to 8 month to the next release but I can be wrong (more likely it
might take even longer) .

For PFoR etc you should look into:

to get started - and read mikes blog

There is also S9
and GroupVInt impls


On Mon, Nov 8, 2010 at 4:59 AM, Li Li <> wrote:
> hi all,
>    When will lucene 4.0 be released?
>    I want to replace VInt compression with fast ones such as
> PForDelta. In my application, decompressing a docList of 10M will use
> about 300ms. In  "Performance of Compressed Inverted List Caching in
> Search Engines. With J. Zhang and X.Long. 17th International World
> Wide Web Conference (WWW), April 2008." , the author says PForDelta is
> much faster than VInt. And I also found a java implementation in
> it's speed is 500
> (M int / sec). But to achieve, I have to modify index file format. And
> I found  in lucene
> 4.0, it will support fore flexible index format. I want to know when
> it will be released so as to decide whether wait it or doing it
> myself. Thank you.
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