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Posted to commits@harmony.apache.org by "Tim Ellison (JIRA)" <ji...@apache.org> on 2006/06/22 12:31:30 UTC
[jira] Assigned: (HARMONY-642) Performance improvement for HashMap
and LinkedHashMap classes
[ http://issues.apache.org/jira/browse/HARMONY-642?page=all ]
Tim Ellison reassigned HARMONY-642:
-----------------------------------
Assign To: Tim Ellison
> Performance improvement for HashMap and LinkedHashMap classes
> -------------------------------------------------------------
>
> Key: HARMONY-642
> URL: http://issues.apache.org/jira/browse/HARMONY-642
> Project: Harmony
> Type: Improvement
> Components: Classlib
> Reporter: Vladimir Strigun
> Assignee: Tim Ellison
> Priority: Minor
> Attachments: Harmony-642.diffs
>
> I'd like to suggest performance improvement for HashMap and LinkedHashMap classes. The patch gives about 6% for DaCapo:fop benchmark and do not degraded on other benchmarks. This patch covers the following issues:
> - removed duplicate call of hashCode() method
> - method findEntry was divided to findNullKeyEntry() and findNotNullKeyEntry()
> - method getModuloHash() was inlined.
> Also, I'd like to share with you results of DaCapo execution on J9+classlib (values are in milliseconds):
> Build Dacapo: fop Dacapo: hsqldb Dacapo: xalan Dacapo: chart
> jdk 774.567 29332.039 4437.278 31260.598
> jdk-UtilFix 723.518 28518.381 4369.438 31690.724
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