You are viewing a plain text version of this content. The canonical link for it is here.

Posted to common-dev@hadoop.apache.org by "Chris Douglas (JIRA)" <ji...@apache.org> on 2009/05/05 08:03:30 UTC

[jira] Updated: (HADOOP-5727) Faster, simpler id.hashCode() which does not allocate memory

     [ https://issues.apache.org/jira/browse/HADOOP-5727?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris Douglas updated HADOOP-5727:
----------------------------------

    Attachment: 5727-0.patch

Removed comments

> Faster, simpler id.hashCode() which does not allocate memory
> ------------------------------------------------------------
>
>                 Key: HADOOP-5727
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5727
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: Shevek
>            Assignee: Shevek
>             Fix For: 0.21.0
>
>         Attachments: 00_id-noallocate.patch, 03_id-noallocate.patch, 5727-0.patch
>
>
> Integer.valueOf allocates memory if the integer is not in the object-cache, which is the vast majority of cases for the task id. It is possible to compute the hash code of an integer without going via the integer cache, and hence avoiding allocating memory.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.