1507716 - Zooming in and Out on Sketchfab.com is laggy with WebRender on

Status: RESOLVED WORKSFORME

(Core :: Graphics: WebRender, defect, P4)

Description

[Rares Doghi, Desktop QA]

Attachment: WebRenderON.mp4

[Affected versions]: 
Beta 64.0b9
Nightly 65.0a1

[Affected platforms]:
Platforms: Windows 10 x64


[Steps to reproduce]:
1. Open the Firefox browser and reach https://sketchfab.com/models/9a20571011fc46108e848ee332c6f6f2
2. Play with the Vehicle (Zoom In and Out)



Expected Result:
Zooming in and Out Fast should go without lagging or noticeable freeze frames

Actual Results:
Zooming in and out from the vehicle will cause a bit of lag and some of the frames might be skipped. 
Please note that without Web Render Zooming In and Out is a bit smoother.

I tried to record this issue but theres no 60fps recording programs out there.. not free at least and so in a video everything seems laggy. I'll attach the video anyways but it is not that bad.
This issue was reproduced on a Windows 10 using NVIDIA GeForce GT 730. 
This issue is a lot more noticeable with an NVIDIA GeForce 210.

Comment 1

[Rares Doghi, Desktop QA]

Please also note that on Nightly using Windows 10 with NVIDIA GeForce GT 730 is a lot smoother than on BETA but with NVIDIA GeForce 210 is a lot worse on Nightly.

Comment 2

[Daniel_A[:daschilean] [Please contact - [e-mail]]]

I verified this issue on Windows 10 x86 with the latest Firefox beta version 64.0b10 (32-bit) and Firefox Nightly 65.0a1 (2018-11-20) (32-bit). Please note that the textures does not loading with WR on and after several seconds the model is displayed as black color.

Comment 3

[Jeff Muizelaar [:jrmuizel]]

Just to confirm. This runs well on Nightly with WebRender off but doesn't run well with WebRender on?

Comment 4

[Rares Doghi, Desktop QA]

With WebRender ON It Runs a bit better on Nightly than on Beta yes.. but it runs even better with WebRender off on both beta and Nightly.

Comment 5

[Kartikaya Gupta (email:[e-mail])]

Next step is to get profiles and see where time is being spent

Comment 6

[Rares Doghi, Desktop QA]

Hi, I managed to get a few profiles using the Gecko Profiler here are the two results with and without the WebRender activated:

Without WebRender - https://perfht.ml/2VICcmn
With WebRender - https://perfht.ml/2VL5qBh

The Differences are minor and barely visible but if you're nitpicking the problem is there, i'm not sure with heavier sites or for the people who spend a lot more time on these websites how it occurs for them but for the 10 minutes of testing i barely noticed any differences.

Comment 7

[Rares Doghi, Desktop QA]

Hi, I can't reproduce this issue anymore in Nightly 67.0a1 (2019-02-07) or beta 66.0b5, I will mark it as Works For Me for now and I will reopen it in case it re-ocurs.