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Date: Wed, 28 Jun 2006 10:57:30 +0000 (GMT+00:00)
From: "George Harley (JIRA)" <jira@apache.org>
To: harmony-commits@incubator.apache.org
Subject: [jira] Resolved: (HARMONY-684) performance improvement for TreeMap
 and TreeSet classes
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     [ http://issues.apache.org/jira/browse/HARMONY-684?page=all ]
     
George Harley resolved HARMONY-684:
-----------------------------------

    Resolution: Fixed

Hi Vladimir, 

Patch committed in revision 417719. Please could you verify that it has been applied as expected. 

Thanks very much for this enhancement. 

Best regards, 
George


> performance improvement for TreeMap and TreeSet classes
> -------------------------------------------------------
>
>          Key: HARMONY-684
>          URL: http://issues.apache.org/jira/browse/HARMONY-684
>      Project: Harmony
>         Type: Improvement

>   Components: Classlib
>     Reporter: Vladimir Strigun
>     Assignee: George Harley
>     Priority: Minor
>  Attachments: Harmony-684.patch
>
> I'd like to suggest performance improvement for TreeMap and TreeSet classes. With the patch I have ~2.8% boost on SPECjbb2005.
> Description of the patch:
> Instead of one common TreeMap iterator for all cases, 9 new iterators are used. The main effect is that for generic iterator yet another object was created (type getter). And when the iterator was created - two objects were allocated: iterator & getter. This is not effective. Creation several specialized iterator classes allows to reduce amount of allocated objects.

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