News for hackers. Stuff that matters.

A comment on Click around, hover over a link.

Re:Click around, hover over a link by pooriaazimi on Thursday September 27, 2012 @11:49PM (#4584222)
Nice hack (especially when you're clicking around), but what caught my eye was that maybe for the first time, Safari is actually waaay faster than Chrome or Firefox.

This is (roughly) the framerate I got when I tried it on the these three browsers (all latest versions, Windows Vista):

    Safari: 60 fps (or 30, or whatever "completely smooth" means)
    Chrome: 20 fps (compared to Safari)
    Firefox: 30 fps (compared to Safari)
But why? Chrome has always been the fastest (on Windows - on Mac, Safari is somewhat smoother for me)???
[ Parent | on HN ]
Re:Click around, hover over a link by amccloud on Friday September 28, 2012 @01:01AM (#4584375)
From what I can tell, requestAnimationFrame in Chrome runs at a slower frame rate. I've had a similar experience with a plugin i'm writing. Maybe I was doing something wrong but requestAnimationFrame was firing once for every ~10 actual frames in Chrome.
[ Parent | on HN ]
Re:Click around, hover over a link by xemoka on Friday September 28, 2012 @12:59AM (#4584373)
Do you have chrome://flags -> "GPU compositing on all pages" set to enabled?
[ Parent | on HN ]
Re:Click around, hover over a link by pooriaazimi on Friday September 28, 2012 @01:05AM (#4584388)
No, it was "Default".

I enabled it and... much to my surprise, the frame rate dropped significantly. It's now like 3 (three) frames per second (it's so slow I am able to actually count the frames!)

The "hover" animation (rainbow thing) is fine, 100% smooth. But the exploding animation is just ridiculously slow.

Then I set it to be disabled and the frame rate improved a little.

    Default: 20 fps
    GPU composition DISABLED: 10 fps
    GPU composition ENABLED: 3 fps
The machine I'm testing with is not particularly powerful, maybe that's the problem. 2 or 3 GBs of RAM, nVidia 9400 (or something like that).
[ Parent | on HN ]
Re:Click around, hover over a link by ygra on Friday September 28, 2012 @05:12AM (#4584771)
A bit sad if that's “not particularly powerful” for animating a few letters on a freaking web page ... :-)
[ Parent | on HN ]