[jira] [Closed] (TAP5-2335) Decrease number of operations with HashMap #2

["Howard M. Lewis Ship (JIRA)" <ji...@apache.org>]

     [ 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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