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From "Aleksey Shipilev (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-5633) [classlib][luni][performance] ObjectStreamClass lookup improvement
Date Tue, 08 Apr 2008 09:25:24 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-5633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12586720#action_12586720
] 

Aleksey Shipilev commented on HARMONY-5633:
-------------------------------------------

Sorry, I had confused weak keys and weak values. Then I have to resort to variant (d). Let
me think more about it.

> [classlib][luni][performance] ObjectStreamClass lookup improvement
> ------------------------------------------------------------------
>
>                 Key: HARMONY-5633
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5633
>             Project: Harmony
>          Issue Type: Improvement
>            Reporter: Aleksey Shipilev
>         Attachments: 0001-serial-lookupClass.patch, serial-lookupClass-RC1.patch
>
>
> For now, ObjectStreamClass (OSC) is created on-the-fly during serialization/deserialization
and stored in static cache.
> Performance problems arose when several threads doing the lookups, hitting on synchronized
cache. Moreover, the cache is built around WeakHashMap to ensure GC of OSCs. This issue is
the source of scalability problems for multi-threaded serialization benchmarks.

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