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From after24 <vinc...@after24.net>
Subject Re: Re:Re: Re:Scroller optimization
Date Mon, 27 Oct 2014 22:18:35 GMT
Hi darkstone,
*
/This issue is probably caused by Scroller and the viewport's layout. When
scrolling with finger, the Scroller will update viewport's horizontal and
vertical scroll positions (actual work is done by viewport.layout), and
might involk some other layout API of the viewport. The instance to the
viewport.layout property is responsible for updating the viewport's
scrollRect, and maintaining the layout of the viewport's direct children,
depending on the structure of the viewport's children, this might consume a
lot CPU resources./*

I'm not sure about that because when the actual viewport is replaced by it's
cached version, the _viewport property of the scroller is actualized to
point on the viewportCache. So the horizontal and vertical scroll positions
shouldn't affect the actual viewport layout during scroll operations.

This  stackoverflow
<http://stackoverflow.com/questions/10037262/building-small-gui-engine-visible-vs-addchild-removechild>
 
post could be an explanation of the difference in performance.

Vincent.



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