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Posted to dev@nutch.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2009/09/09 07:35:57 UTC
[jira] Commented: (NUTCH-702) Lazy Instanciation of Metadata in
CrawlDatum
[ https://issues.apache.org/jira/browse/NUTCH-702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12752913#action_12752913 ]
Hudson commented on NUTCH-702:
------------------------------
Integrated in Nutch-trunk #929 (See [http://hudson.zones.apache.org/hudson/job/Nutch-trunk/929/])
- Lazy Instanciation of Metadata in CrawlDatum. Contributed by Julien Nioche.
> Lazy Instanciation of Metadata in CrawlDatum
> --------------------------------------------
>
> Key: NUTCH-702
> URL: https://issues.apache.org/jira/browse/NUTCH-702
> Project: Nutch
> Issue Type: Improvement
> Affects Versions: 1.0.0
> Reporter: Julien Nioche
> Fix For: 1.1
>
> Attachments: NUTCH-702.patch, NUTCH-702.patch.v2, NUTCH-702v3.patch
>
>
> CrawlDatum systematically instanciates its metadata, which is quite wasteful especially in the case of CrawlDBReducer when it generates a new CrawlDatum for each incoming link before storing it in a List.
> Initial testing on the lazy instanciation shows an improvement in both speed and memory consumption. I will generate a patch for it ASAP
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