[web-vr] Firefox WebVR very stuttery?

RavenWorks omgitsraven at gmail.com
Thu Oct 29 22:41:44 UTC 2015


Ah, great, thank you!

While I think of it, is there any kind of changelog or something that I 
should be looking at to keep up with these things?


On 2015-10-29 6:37 PM, Joshua Carpenter wrote:
> Quick response from meeting: for smooth results in current Nightly 
> builds you need to set your HMD refresh rate to 60hz. With the 0.7 and 
> 0.8 Oculus SDK, this is no longer possible. So for the time being, for 
> smooth results in Firefox, you need to use the 0.6 SDK, which does 
> allow refresh rate configuration.
>
> The good news is: adaptive refresh rates are coming to Firefox Nightly 
> very soon. So Firefox will render at the native device vsync of the 
> HMD—no user configuration required. With support for the 0.7 SDK (and 
> 0.8 soon after). We have this working in one-off builds, and it's a 
> very nice performance boost. Lower latency, lower pixel persistence, 
> and higher refresh rates.
>
> The hope is that lands the week after next in Nightly.
>
>> Josh Carpenter
> Product Designer, MozVR
> Mozilla
>
> On Thu, Oct 29, 2015 at 3:33 PM, RavenWorks <omgitsraven at gmail.com 
> <mailto:omgitsraven at gmail.com>> wrote:
>
>     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
>     <http://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 0.8.0.0, 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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>
>

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