Canvas & low FSP on Mac OS

[Ugo Stephant]

Hi people,

I'm creating a 2D HTML5 game and experiencing a huge problem with the Canvas. I tested it with 3 configurations : 

- Asus notebook : Windows 8, Chrome 25, AMD Athlon II 2*2.00ghz, 4gb ram, ATI Mobility Radeon HD 4670 (1gb)

- iMac 27" : Mac OS 10.8.3, Chrome 25, Intel core i5 4*2.7ghz, 8gb ram, AMD Radeon HD 6770M (512mb)

- Windows 8 on Parallel Desktop, on the iMac, with Chrome 25 too

When I'm on Windows (whatever the PC is, even on the virtual machine) the game runs pretty cool, with 60 fps. But when I test it on Mac OS, it suddenly falls to 6fps, without anything running apart from Chrome (even when I put the screen resolution to 1024*768).

I found a trick, in the chrome://flags tab, with disabling the "hardware acceleration for 2D Canvas" and the "delayed render for 2D Canvas" (I translated the name from french, so it may differ from what you have). With that settings and the normal resolution (2560*1440) it painfully runs at 30fps...

Anyone had the same problem ? Or am I just going to say "Hey you, player, throw your mac in the trash, and go buy a PC" ?

I already tried to ask Batman for his help, but everybody told me he died saving Gotham... :(

Ugo.

[Nico Weber]

Hi Ugo,

can you file a bug at http://crbug.com/new ? Include reproduction steps, the output of about:gpu, and ideally a reduced example case.

Thanks!

Nico

Ugo.

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