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From "Aleksey Shipilev (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-5633) [classlib][luni][performance] ObjectStreamClass lookup improvement
Date Thu, 17 Apr 2008 12:37:21 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-5633?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aleksey Shipilev updated HARMONY-5633:
--------------------------------------

    Issue Type: Sub-task  (was: Improvement)
        Parent: HARMONY-5632

> [classlib][luni][performance] ObjectStreamClass lookup improvement
> ------------------------------------------------------------------
>
>                 Key: HARMONY-5633
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5633
>             Project: Harmony
>          Issue Type: Sub-task
>            Reporter: Aleksey Shipilev
>            Assignee: Alexey Varlamov
>             Fix For: 5.0M6
>
>         Attachments: 0001-serial-lookupClass.patch, serial-lookupClass-RC1.patch, serial-lookupClass-RC2.patch,
serial-lookupClass-RC3.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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