1411503 - New browser/dialog window is white for 5-10 sec (no UI element and contents)

Status: RESOLVED WORKSFORME

(Core :: Graphics: WebRender, defect, P2)

Description

[Alice0775 White]

Attachment: about_support.txt

Build Identifier:
Build ID 	20171024220325
User Agent 	Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:58.0) Gecko/20100101 Firefox/58.0

Reproducible: always

Steps To Reproduce:
1. Enabled webrender
user_pref("gfx.webrender.enabled", true);
user_pref("gfx.webrender.layers-free", true);
user_pref("gfx.webrender.blob-images", true);
user_pref("gfx.webrendest.enabled", true);

2. Launch nightly, and open any dialog

Actual Results:
window is black temporarily. After about 3-5 dec, the window/dialog is rendering properly.

Expected Results:
Not delay.

Comment 1

[Alice0775 White]

Attachment: screenshot

Comment 2

[Darkspirit]

Thank you!
Confirmed in Nightly 58 x64 20171102100041 de_DE @ Windows 10 1703 (Radeon RX480).
fresh profile: gfx.webrender.enabled

I had the same observation an hour ago:
(Jan Andre Ikenmeyer [:darkspirit] from bug 1413961 comment 4)
> In general, WebRender(?) starts slow on Windows: A freshly started Nightly has a completely black window for about 2 seconds. 
> The same when using Awesomebar for the first time: A black box (the Awesomebar) pops down and just after ca. 2 seconds it has its regular content.

Comment 3

[Darkspirit]

Black for about 2 seconds with gfx.webrender.force-angle;true (default),
white for about 0.2 seconds with gfx.webrender.force-angle;false:
* Nightly start
* First use of Awesomebar
* First opening of Help > About
* about:profiles > Create new profile

Comment 4

[Alice0775 White]

today, white window for a long time instead black...

Comment 5

[Alice0775 White]

Attachment: about:support

Comment 6

[Alice0775 White]

Attachment: screenshot

Comment 7

[Alice0775 White]

gecko profiler log from start up(set MOZ_PROFILER_STARTUP=1)

WebRender on:  https://perfht.ml/2E6gKyp
WebRender off: https://perfht.ml/2E5Q3Kp

Comment 8

[Milan Sreckovic [:milan] (needinfo for best results)]

Sotaro, this didn't get any slower recently, right?  We still have the first one take a while, then cache enough stuff to make the subsequent windows being created faster?

Comment 9

[Sotaro Ikeda [:sotaro]]

It didn't get slower recently. First window drawing is already slow. But it seemed gradually getting slower by growing glsl shader code size though. 2nd window should be relatively fast compared to 1st window

I got start up profile with the following command from it. With it, majority of time was spent for compiling glsl by ANGLE on Renderer thread.

 >  MOZ_PROFILER_STARTUP=1 MOZ_PROFILER_STARTUP_FILTERS=GeckoMain,Compositor,Renderer "/c/Program Files/Nightly/firefox.exe"

https://perfht.ml/2FRTSDf

Comment 10

[Aria Beingessner [:Gankra]]

new windows seem to open in ~1 second for me now that bug 1418202 is resolved, can you confirm the issue is resolved for you?

Comment 11

[Alice0775 White]

It's a little slower than wrbrender off in the new profile.
But, I do not care anymore.