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https://issues.apache.org/jira/browse/LUCENE-550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12571948#action_12571948
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Karl Wettin commented on LUCENE-550:
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{quote}
Did zOlive ever post his code Jakarta Commons? Without him actually doing it, I
don't know that it is good enough legally to accept it.
{quote}
He did not. Should I ask him to post the code as an ASL-tagged attachment to
this issue? Or is commons a better place?
{quote}
Also, is your last comment such that you think there is a new patch?
{quote}
Not anytime soon. They are only ideas that could make it a bit less ad hoc. But
I'm actually quite happy with the way it works now. The code has sucessfully
been used in a handful of commercial projects.
> InstantiatedIndex - faster but memory consuming index
> -----------------------------------------------------
>
> Key: LUCENE-550
> URL: https://issues.apache.org/jira/browse/LUCENE-550
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Store
> Affects Versions: 2.0.0
> Reporter: Karl Wettin
> Assignee: Grant Ingersoll
> Attachments: HitCollectionBench.jpg,
> LUCENE-550_20071021_no_core_changes.txt, test-reports.zip
>
>
> Represented as a coupled graph of class instances, this all-in-memory index
> store implementation delivers search results up to a 100 times faster than
> the file-centric RAMDirectory at the cost of greater RAM consumption.
> Performance seems to be a little bit better than log2n (binary search). No
> real data on that, just my eyes.
> Populated with a single document InstantiatedIndex is almost, but not quite,
> as fast as MemoryIndex.
> At 20,000 document 10-50 characters long InstantiatedIndex outperforms
> RAMDirectory some 30x,
> 15x at 100 documents of 2000 charachters length,
> and is linear to RAMDirectory at 10,000 documents of 2000 characters length.
> Mileage may vary depending on term saturation.
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