[ 
http://issues.apache.org/jira/browse/LUCENE-550?page=comments#action_12416583 ] 

Karl Wettin commented on LUCENE-550:
------------------------------------

There is a bug with phrase queries. Possible term positions. Low priority for 
me.

> InstanciatedIndex - faster but memory consuming index
> -----------------------------------------------------
>
>          Key: LUCENE-550
>          URL: http://issues.apache.org/jira/browse/LUCENE-550
>      Project: Lucene - Java
>         Type: New Feature

>   Components: Store
>     Versions: 1.9
>     Reporter: Karl Wettin
>  Attachments: InstanciatedIndexTermEnum.java, class_diagram.png, 
> class_diagram.png, instanciated_20060527.tar, lucene.1.9-karl1.jpg
>
> After fixing the bugs, it's now 4.5 -> 5 times the speed. This is true for 
> both at index and query time. Sorry if I got your hopes up too much. There 
> are still things to be done though. Might not have time to do anything with 
> this until next month, so here is the code if anyone wants a peek.
> Not good enough for Jira yet, but if someone wants to fool around with it, 
> here it is. The implementation passes a TermEnum -> TermDocs -> Fields -> 
> TermVector comparation against the same data in a Directory.
> When it comes to features, offsets don't exists and positions are stored ugly 
> and has bugs.
> You might notice that norms are float[] and not byte[]. That is me who 
> refactored it to see if it would do any good. Bit shifting don't take many 
> ticks, so I might just revert that.
> I belive the code is quite self explaining.
> InstanciatedIndex ii = ..
> ii.new InstanciatedIndexReader();
> ii.addDocument(s).. replace IndexWriter for now.

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