[jira] Commented: (HARMONY-5633) [drlvm][performance] ObjectStreamClass lookup improvement

["Aleksey Shipilev (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HARMONY-5633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12581421#action_12581421 ] 

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

This POC patch gives up to +80% boost on MT/SerialBench running at 8-core Clovertown.

> [drlvm][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
>
>
> 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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