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From Kevin Zhou <zhoukevi...@gmail.com>
Subject Re: [jira] Commented: (HARMONY-6045) [classlib] [luni] Optimize java.lang.String.toUpperCase(), String.toLowerCase() and String sharing for more performance gains
Date Thu, 16 Apr 2009 09:32:26 GMT
Previously, it is proved by using benchmarks like Specjbb.
Since it's been a long time I don't really remember the accurate statistics
of how much improvements it brings.

On Thu, Apr 16, 2009 at 5:18 PM, Regis Xu (JIRA) <jira@apache.org> wrote:

>
>    [
> https://issues.apache.org/jira/browse/HARMONY-6045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12699595#action_12699595]
>
> Regis Xu commented on HARMONY-6045:
> -----------------------------------
>
> Hi Kevin,
>
> This patch is interesting, do you have any benchmark to prove the
> improvement?
>
> > [classlib] [luni] Optimize java.lang.String.toUpperCase(),
> String.toLowerCase() and String sharing for more performance gains
> >
> -----------------------------------------------------------------------------------------------------------------------------
> >
> >                 Key: HARMONY-6045
> >                 URL: https://issues.apache.org/jira/browse/HARMONY-6045
> >             Project: Harmony
> >          Issue Type: Improvement
> >          Components: Classlib
> >    Affects Versions: 5.0M8
> >            Reporter: Kevin Zhou
> >             Fix For: 5.0M9
> >
> >         Attachments: HARMONY-6045.diff
> >
> >   Original Estimate: 24h
> >  Remaining Estimate: 24h
> >
> > Recently, I make some improvement on java.lang.String and
> java.lang.AbstractStringBuilder class for more performance gains.
> > 1. Move the share mode for all the AbstractStringBuilder.append method,
> since the append never change the share things.
> > 2. Move the share mode in AbstractStringBuilder.setLength method
> > 3. Add the special care for the ASCII things, especially on case things
> of String.toUpperCase and to LowerCase methods.
>
> --
> This message is automatically generated by JIRA.
> -
> You can reply to this email to add a comment to the issue online.
>
>

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