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The web at maximum FPS: How WebRender gets rid of jank

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Re: The web at maximum FPS: How WebRender gets rid of jank

#152

Post by esaym »

metajack wrote: post #61
pohl wrote: post #33

Earlier quoted context omitted.

The Radeon Pro 560 on my MacBook Pro can draw "up to 75W". I don't know anything about how it manages power, but I do recall that Apple recommended in a WWDC session on writing energy-efficient apps that one should be careful to not trigger the discrete GPU when the integrated Intel GPU is sufficient. So that leads to another question: on my machine, which GPU would Webrender be using? I suppose I could find out expe…

For WebRender, we targeted the integrated GPUs. You still need some logic to ensure you don't accidentally kick the discrete one into gear, but the integrated ones definitely have enough performance for almost anything WR will throw at it.

Is there any requirements for a minimum version of opengl for WebRender that you know of?

Re: The web at maximum FPS: How WebRender gets rid of jank

#153

Post by pimeys »

GoodbyeEarl wrote: post #140
pimeys wrote: post #87

Earlier quoted context omitted.

I've been working professionally with Rust for a year now. When I got over the first wall, it has become the best tool I've had for creating backend applications. I have history with at least nine different languages during my professional career, but nothing comes close giving the confidence and ergonomics than the tools Rust ecosystem provides. Firefox, especially the new Quantum version is awesome. But Rust as a s…

Hey, is it restful APIs that you write or more like crud apps with rendered views?

We get events in and trigger other events in the system. So basic SOA with a message broker in the middle.

Our REST stuff with quite minimal traffic is done with Clojure.

Re: The web at maximum FPS: How WebRender gets rid of jank

#154

Post by pimeys »

fb03 wrote: post #108
pimeys wrote: post #87

Earlier quoted context omitted.

I've been working professionally with Rust for a year now. When I got over the first wall, it has become the best tool I've had for creating backend applications. I have history with at least nine different languages during my professional career, but nothing comes close giving the confidence and ergonomics than the tools Rust ecosystem provides. Firefox, especially the new Quantum version is awesome. But Rust as a s…

nice! can you talk more about Rust's tooling? How do you debug? What IDE or text editor do you feel comfy with? Do you have/use/need autocomplete? I'm coming from a a Python background and I'm too spoiled by Pycharm's insane tooling and autocomplete and stuff.. I wanna trail de Rust path too! thanks in advance.

Maybe one day I'm jumping the IDE train, but now it's Emacs with racer.

Re: The web at maximum FPS: How WebRender gets rid of jank

#155

Post by 482794793792894 »

shmerl wrote: post #64

Is it going to use Vulkan? Sounds like a good fit for proper parallelized rendering. UPDATE: Ah, I see it's mentioned in the future work: https://github.com/servo/webrender/wiki#future-work Vulkan? This could possibly make some of the serial steps above able to be parallelized further. So it will be using OpenGL then?

Vulkan has been a consideration from the earliest architecturing steps done in WebRender. So, the internal pipelines are all set up to be mapped to Vulkan's pipelines.

It's actually OpenGL which fits less into the architecture, but it's still easier to just bundle WebRender's pipelines all together and then throw that into OpenGL.

Re: The web at maximum FPS: How WebRender gets rid of jank

#158

Post by nicalsilva »

ricardobeat wrote: post #45
RussianCow wrote: post #38

Earlier quoted context omitted.

I don't think this is actually true. If you're looking at a static page that doesn't change in any way, isn't the browser completely idle? Edit: To clarify, I realize that the screen gets refreshed ~60 times per second (depending on refresh rate), but I don't think any rendering actually happens if it doesn't need to.

The GPU is still painting the screen at a set refresh rate (your monitor’s). Some monitors have variable refresh rates, but don’t go any lower than 30hz, and depending on settings like vsync the gpu might still be churning through hundreds of wasted frames. The latest iPads can go down to 24hz to save energy due to their custom 120hz display, but that’s a rarity.

Let's clarify, WebRender doesn't do anything at all if nothing changed. If the content of the window is static then webrender won't wake your gpu up until it really needs to. There seem to be a confusion about video games needing to render at constant frame rate, but that is only the case in games where there is always something changing on screen. It isn't that uncommon for other types of games with more static graphics to not render if nothing has changed.

Re: The web at maximum FPS: How WebRender gets rid of jank

#159

Post by dao- »

the_duke wrote: post #100
kkarp wrote: post #90

Earlier quoted context omitted.

I suggest reporting a bug to Bugzilla. The positive side effect will be you will see how efficiently they handle such reports. And you will get it fixed.

I'm pretty sure they are aware of it. I have the same issues on Linux. It's really fast, but often it hogs one core completely and the CPU does a lot of work, sending the fans in overdrive. Especially when videos are involved. Let's hope things get ironed until a stable release in november

We're aware that there seems to be a problem, but we can't reproduce it yet: https://bugzilla.mozilla.org/show_bug.cgi?id=1404042 Any additional data points, test cases etc. are appreciated.
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