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Re:Effeckt.css by kbrackbill on Thursday July 18, 2013 @01:27AM (#6061926)
Everything is smooth and looks great in Chromium, but the whole page is sluggish in Firefox (on linux at least, and usually firefox on windows is worse).

This has been generally true in my experience playing with CSS animations. Are there any tricks to optimize stuff like this in Firefox, or is it just an area where Chromium is still way far ahead in performance?

Re:Effeckt.css by agildehaus on Thursday July 18, 2013 @01:32AM (#6061941)
Feels snappy to me on Firefox/Win32. Tremendously sluggish on Chrome on my Nexus4 though.
Re:Effeckt.css by Xephyrous on Thursday July 18, 2013 @01:34AM (#6061945)
Also feels snappy to me on Firefox/Xubuntu
Re:Effeckt.css by kbrackbill on Thursday July 18, 2013 @01:37AM (#6061951)
Hmm, maybe it's just a problem with my setup then.
Re:Effeckt.css by shmerl on Thursday July 18, 2013 @12:35PM (#6064727)
Yes, some animations are sluggish for me in Firefox as well. (Mozilla/5.0 (X11; Linux x86_64; rv:22.0) Gecko/20100101 Firefox/22.0).

I'm using current Nvidia closed driver with a mobile chipset.

Re:Effeckt.css by mnemonik on Thursday July 18, 2013 @02:18AM (#6062067)
You could try pulling up our profiler (Shift+F5).

I didn't experience any jankiness and wasn't able to find anything by profiling either.

Re:Effeckt.css by kbrackbill on Thursday July 18, 2013 @02:48AM (#6062172)
I couldn't find anything in the profiler either. I did narrow it down a bit though. Most of what I was experiencing was sluggishness in scrolling around the page, not in the animations themselves. I realized that in particular, scolling around the top of the page where all the buttons for the modals are. If I hide all of the buttons, the page works great. So somehow something really bad is happening trying to render a bunch of buttons (I made a test page with a few hundred buttons on it and it hung for a few minutes when I tried to scroll). That sounds pretty crazy, so I'm going to assume this is something funky with my configuration and not with Firefox.

Once I got past that, I'm really impressed with how well these animations perform.

(By the way, I haven't used the Firefox dev tools in a while, and they've come a long way! I'll switch back from chrome soon if they keep improving at this rate)