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Posted to dev@lucene.apache.org by "Robert Muir (JIRA)" <ji...@apache.org> on 2012/10/31 13:21:14 UTC

[jira] [Commented] (LUCENE-4515) Make MemoryIndex more memory efficient

    [ https://issues.apache.org/jira/browse/LUCENE-4515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13487705#comment-13487705 ] 

Robert Muir commented on LUCENE-4515:
-------------------------------------

Are we sure this is the right direction to go for MemoryIndex?

I think its being abused for highlighting: but it has other real use cases and we shouldn't make it worse for its real use cases just because highlighting abuses it.

instead I think if the concern is garbage then maybe just use term vectors and compute this stuff at index time.


                
> Make MemoryIndex more memory efficient
> --------------------------------------
>
>                 Key: LUCENE-4515
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4515
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/other
>    Affects Versions: 4.0, 4.1, 5.0
>            Reporter: Simon Willnauer
>             Fix For: 4.1, 5.0
>
>         Attachments: LUCENE-4515.patch
>
>
> Currently MemoryIndex uses BytesRef objects to represent terms and holds an int[] per term per field to represent postings. For highlighting this creates a ton of objects for each search that 1. need to be GCed and 2. can't be reused.

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