> I'm pretty certain Preview is using IKImageView, or at least it used to.

Mike, Preview doesn't use IKImageView in 10.6. That class is really
slow, probably because it has a ton of bells and whistles, and it
doesn't show up in the stack frames when I look at Preview in
Instruments (Preview appears to use custom view classes).

> Well, your multiple approaches make me wonder what you mean by "draw"
> but take a look at the graphics context's interpolation quality for scaling. 
> It
> makes a huge difference.

Seth, even the highest quality interpolation looks awful in a lot of
my use cases. It's inferior to drawing directly into a properly sized
hosted layer.
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