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Posted to commits@harmony.apache.org by "Sian January (JIRA)" <ji...@apache.org> on 2008/07/21 11:25:31 UTC

[jira] Assigned: (HARMONY-5920) [classlib][pack200][performance] ArrayList usage optimization

     [ https://issues.apache.org/jira/browse/HARMONY-5920?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sian January reassigned HARMONY-5920:
-------------------------------------

    Assignee: Sian January

> [classlib][pack200][performance] ArrayList usage optimization
> -------------------------------------------------------------
>
>                 Key: HARMONY-5920
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5920
>             Project: Harmony
>          Issue Type: Improvement
>         Environment: Latest pack200
>            Reporter: Aleksey Shipilev
>            Assignee: Sian January
>         Attachments: pack200-arraylist-v3.patch
>
>
> 1. Microbenchmark on Sun 1.6.0_05 shows that iterating ArrayList via iterators is 3x slower than iterating via get(). This issue eliminates iterator() in favor of get().
> 2. ArrayList-s are frequently instantiated with default capacity, even when the storage size is known. This issue sets the default capacities where applicable.

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