Re: firefox, scaled images, and performance?

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On 12/27/2010 01:32 PM, Tom Horsley wrote:
> On Mon, 27 Dec 2010 13:13:24 -0800
> Konstantin Svist wrote:
>
>> You're not crazy, you just didn't describe how to reproduce the problem.
>> Using above example, open the Save Image dialog but don't bother
>> browsing. Instead, just drag it around the screen in front of the image
>> -- it's VERY slow compared to unscaled.
> Yea, I discovered later that was a good way to notice problems
> as well. It is kind of hard to guess exactly which things are
> going to be slow. I wonder if this is another manifestation of
> the cairo bug (628331). I'll have to try downloading the mozilla
> binaries and see if I see the same slowdown.

Most likely Firefox doesn't cache the scaled image -- so when you move a 
window on top of the image and Fx has to redraw, it has to scale it all 
the way down, first.

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