Webrender: WebRender has a hard time on https://www.digitalocean.com/
Go to https://www.digitalocean.com/ and scroll down.
nical
All 10 comments
Appears to be Bugzilled as: https://bugzilla.mozilla.org/show_bug.cgi?id=1456555
Gankra
on 25 Apr 2018
mstange
on 25 Apr 2018
From a quick profile, some issues with clips performance around halfway down the page. At the bottom of the page there are a number of large radial gradients which are very slow, for some reason. The rest of the page runs fine. We'll need to investigate those two parts of the page in more detail to see what is going on.
glennw
on 2 May 2018
Oh, interesting. In the middle of the page the GPU time is not a problem at all. There are huge times in the backend thread (~28ms) and the display list timing code (~15ms). Are these blob related, perhaps?
glennw
on 2 May 2018
(The primitive count is quite low - only ~300 primitives, so it must be something unusual for the backend thread / DL time to be that high).
glennw
on 2 May 2018
Oh, it's the same at the bottom of the page. The GPU time isn't actually that bad - it's all inside the DL / backend counters that the problem is. I'm guessing blob-related, but I don't have any confirmation of that yet.
glennw
on 2 May 2018
I believe radial gradients are known to be very slow in blobs
Gankra
on 2 May 2018
The big problem with this page is the blob image. The main solution to this problem is async blobs images.
jrmuizel
on 2 May 2018
The blob image is mostly blocked on SVG filtering. Once we support SVG filters in WebRender we'll be able to run this on the GPU which should help a lot.
jrmuizel
on 2 May 2018
They changed the page and we have plenty of blob performance items on file, closing.
nical
on 10 Jan 2019
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Most helpful comment
The blob image is mostly blocked on SVG filtering. Once we support SVG filters in WebRender we'll be able to run this on the GPU which should help a lot.