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Posted to dev@tapestry.apache.org by "Howard M. Lewis Ship (JIRA)" <ji...@apache.org> on 2014/08/01 21:53:40 UTC
[jira] [Closed] (TAP5-2335) Decrease number of operations with
HashMap #2
[ https://issues.apache.org/jira/browse/TAP5-2335?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Howard M. Lewis Ship closed TAP5-2335.
--------------------------------------
Resolution: Fixed
Fix Version/s: 5.4
Assignee: Howard M. Lewis Ship
> Decrease number of operations with HashMap #2
> ---------------------------------------------
>
> Key: TAP5-2335
> URL: https://issues.apache.org/jira/browse/TAP5-2335
> Project: Tapestry 5
> Issue Type: Improvement
> Reporter: Michael Mikhulya
> Assignee: Howard M. Lewis Ship
> Fix For: 5.4
>
> Attachments: 0001-TAP5-2335-Decrease-number-of-operations-with-HashMap.patch
>
>
> During profiling of tapestry framework I found that HashMap is actively used in following code:
> {code:title=NamedSet.java}
> public void eachValue(Worker<T> worker)
> {
> F.flow(getValues()).each(worker);
> }
> {code}
> Here HashSet (which internally uses HashMap) is created inside getValues() only to iterate over it.
> I changed code to use ArrayList instead of HashSet.
> With following patch time per request decreased on 3.5 ms (7.4% of overall time). Measurements were done with apache benchmark on a real application after warm up phase.
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