[cairo] Image scaling performance on X

[Boris Zbarsky]

I recently ran into a serious issue with image scaling performance in 
cairo-based Gecko builds on Linux [1].  I spent some time looking at the Gecko 
end of the code, but at the moment it's looking to me like this is a performance 
problem in Render...  It's definitely happening with an older Render (0.9 over 
here), and possibly also with whatever Render Fedora Core 6 ships.

Is there by any chance an existing ticket somewhere tracking this?  If this is 
strongly dependent on the Render version, would it be possible to work around 
older Render versions somehow?

-Boris

[1] https://bugzilla.mozilla.org/show_bug.cgi?id=371892