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Posted to commits@harmony.apache.org by "Aleksey Shipilev (JIRA)" <ji...@apache.org> on 2008/07/11 23:04:31 UTC

[jira] Commented: (HARMONY-5907) [classlib][pack200]CPUTF8.hashCode() is slow

    [ https://issues.apache.org/jira/browse/HARMONY-5907?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12612992#action_12612992 ] 

Aleksey Shipilev commented on HARMONY-5907:
-------------------------------------------

It would be great to review all hashcode implementations around pack200. I see ClassFileEntry.hashcode() as good example.

> [classlib][pack200]CPUTF8.hashCode() is slow
> --------------------------------------------
>
>                 Key: HARMONY-5907
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5907
>             Project: Harmony
>          Issue Type: Improvement
>    Affects Versions: 5.0M6
>         Environment: Latest pack200
>            Reporter: Andrew Cornwall
>         Attachments: main.patch
>
>
> The unpack process spends a lot of time doing CPUTF8.hashCode() - which does String.hashCode(). We can save about 1.5 seconds of my 39 second test case (about 4%) by caching the hashCode. (I thought we did this before - or maybe I dreamt it?)

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