[jira] Updated: (HARMONY-5575) [classlib][pack200] Pack200 is slow adding to classpool

["Andrew Cornwall (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HARMONY-5575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Cornwall updated HARMONY-5575:
-------------------------------------

    Summary: [classlib][pack200] Pack200 is slow adding to classpool  (was: [classlib][pack200])

> [classlib][pack200] Pack200 is slow adding to classpool
> -------------------------------------------------------
>
>                 Key: HARMONY-5575
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5575
>             Project: Harmony
>          Issue Type: Improvement
>          Components: Classlib
>         Environment: All pack200
>            Reporter: Andrew Cornwall
>         Attachments: main.patch
>
>
> There are performance issues with Pack200. The real problem is probably the fact that I'm creating lots of garbage in the comparators, but some of that can be alleviated by deferring the sort until after all the ClassFileEntries are known.
> This patch defers the sort.  It reduces the runtime of the JUnit tests from 12.812 seconds to 7.359 seconds, which is not insignificant.
> (Unfortunately, this patch also appears to have changed existing tabs to spaces, so it's larger than it should be.)

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