Re: Style animation test - for Tdhtml?

Boris Zbarsky <[email protected]> Wed, 16 Jan 2008 15:17:54 -0600
Newsgroups gmane.comp.mozilla.performance
Message-ID <[email protected]>
Schrep wrote:
> No not missing anything :-).  Yes - just noticed if you click recycle
> to move to random positions the animation is quite jerky on FF2 and
> smooth on FF3.

There's an animation?  On trunk when I click "recycle" my CPU pegs for a bit and 
then everything is painted in a new position...

> Mostly I should have checked out Tdhtml to make sure we are covering
> this stuff.

We're not, really.  None of our performance tests cover user perception, 
including animation smoothness.  In fact, quite the opposite: Tdhtml would show 
a win if we had a bug that caused us to stop painting all the intermediate 
frames and only paint the first and last.  Tp has the same problem (e.g. if we 
don't paint or reflow before onload Tp wins, but user perception loses).  Ts and 
Txul may well have similar issues.

If we can figure out a way to quantify and measure DHTML animation smoothness, 
that would be quite nice!

> Sorry for the spam

I don't think it's spam.  It just wasn't clear what the question is.  Thank you 
for explaining!

-Boris