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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (NUTCH-702) Lazy Instanciation of Metadata in CrawlDatum
Date Wed, 09 Sep 2009 05:35:57 GMT

    [ 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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