Hi _murat,Please log a bug on this for us.

--corbin

On 05/17/12, "mlist0...@gmail.com"  <mlist0...@gmail.com> wrote:
> I have an NSCollectionView with really simple (i.e. no tracking areas) item 
> views. 
> 
> In a test case of about 1500 items, scrolling gets unacceptably choppy. I've 
> tracked this down to calls to a private method, 
> -[NSView _updateTrackingAreas]. 
> 
> While scrolling,  _updateTrackingAreas is called for my item views each time 
> they move a few pixels, even though they have no tracking areas. 
> _updateTrackingAreas in turn calls 
> -[NSNotificationCenter postNotificationName:object:userInfo:], which is what 
> is actually taking up all the time.
> 
> Stubbing out _updateTrackingAreas improves the scrolling dramatically, but 
> I'd like to find a sanctioned way to at least delay the recalculation of 
> tracking areas until scrolling is done.
> 
> Any pointers?
> 
> _murat
> 
> 
> 
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