You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@lucene.apache.org by "Grant Ingersoll (JIRA)" <ji...@apache.org> on 2007/12/10 23:13:43 UTC
[jira] Commented: (LUCENE-550) InstantiatedIndex - faster but
memory consuming index
[ https://issues.apache.org/jira/browse/LUCENE-550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12550209 ]
Grant Ingersoll commented on LUCENE-550:
----------------------------------------
{quote}
courtesy of Olivier Chafik
{quote}
What does this mean? He contributed the code personally or you got it from him? In other words, do you have the authority to assign the ASF copyright for said code?
FYI, the patch applies clean and compiles. I still have some benchmarking to do, but would like to commit.
> 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.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: java-dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-dev-help@lucene.apache.org