[web-vr] Firefox WebVR very stuttery?

RavenWorks omgitsraven at gmail.com
Thu Oct 29 22:33:31 UTC 2015

I've just gotten back into WebVR after a bit of a break, and I'm finding 
that Firefox's WebVR is immensely stuttery, in a way that Chrome isn't 
for the same content. I don't think this used to be the case -- has it 
gotten worse lately for anyone else? This is happening on my own 
homemade code, and on sites like mozvr.com.

The strangest part is that logging the times of my requestAnimationFrame 
callbacks suggests I'm actually getting a *very* high frame rate (higher 
than the display rate even), which makes it seem like it's not a 
rendering problem at all, but some other bottleneck?

I haven't figured out what's going on precisely enough to do anything 
like file a bug report yet, but I figured I'd at least check if I'm the 
only one having this experience or not. I'm running Windows 7 64-bit, 
SDK, Nightly 44.0a1 (2015-10-28).

While I think of it, I'm also getting a lot of flickering black in the 
right eye of my DK2 in Firefox (but not in Chrome), in a way that seems 
reminiscent of vsync-related screen tearing, in case that's relevant.

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