Mac OSX Firefox 4 - flash is very slow

Has anyone else found that flash is VERY slow when using Firefox 4 on Mac OS X?

This happens when the .swf gets larger than ~1000px, the whole .swf is slow to scrol开发者_如何学JAVAl, respond, etc.

Has anyone else noticed this and figured out something to enhance speed?

Thanks!

I've always noticed Flash to be slower on Macs than any other OS. I believe it has something to do with the lock that Macs have on any application, but it could also be because you're using wmode='transparent' or there's a lot of bad performing code in your application.

It really depends on what you're doing in the SWF, but seeing as your problem is happening when the SWF gets bigger than 1000px, it's probably drawing a crap ton of vectors. If you have a link to the SWF in question, it'd be easier to figure out.

Also, as J_A_X mentioned, it's only recently that Macs have allowed Flash Player access to hardware acceleration

ran into the same problem and ONLY in firefox4 OSX. We managed to get a significant speed boost by removing the page css which was scaling a background image beyond the window constraints - my guess is this process is handed off to the GPU by webkit but not so much in firefox. i'd suggest looking carefully at any 100%+ values in the css...

This even made youtube embeds on the page play smoother.