Slate embedded browser runs very slow

Development Programming & Scripting UI
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1

The embedded browser seems to run very slow. I’d actually like to call it unusable.
 
I can see this in several places:

  • In the launcher, the community tab is very sluggish to scroll. The library tab is fine.
  • In the stand alone SlateViewer program, the browser appears to run at 25 fps. Scrolling a simple google results page feels very crappy.
  • The UMG browser widget also runs at 25 fps in the editor.

This is what the browser in SlateViewer shows on the testufo.com page:

https://vgy.me/KU0o7Q.png

My hardware:

  • i7 7820X
  • GTX 1080ti
  • 32GB ram
  • Asus PG348Q (3440x1440, 100hz, g-sync)
     
    The editor itself runs fine as expected.
    What’s the issue here? Maybe the embedded browser is outdated?
2

Hello Zeblote,

I have a few questions for you that will help narrow down what issue it is that you are experiencing.

Quick questions:

  1. Can you reproduce this issue in a clean project?
  2. If so, could you provide a detailed list of steps to reproduce this issue on our end?
  3. Could you provide screen shots of any blueprints/widgets/settings that may be involved with this issue?
  4. Could you provide any bench marks used to determine the speed of the browser?
3

To 1: Yes. I can reproduce this issue anywhere where the embedded browser is used. This includes any browser widget in any project, the slate test app in the github repo (test suite 1 tab), your launcher (unreal engine/community tab), and the frag center in unreal tournament (which, by the way, is also blurry).

To 2, 3, 4: Well I’m not sure. Open anything that contains an embedded browser and scroll a page (it feels laggy) or open testufo.com (it shows running at 24 fps). I’m not aware of any settings that could be responsible for this.

4

Hello Zeblote,

I was able to reproduce this issue on our end. I have written up a report and I have submitted to the developers for further consideration. I have also provided a link to the public tracker. Please feel free to use the link provided for future updates.

Link: Unreal Engine Issues and Bug Tracker (UE-39343)

Make it a great day

5

Any news on this issue? The embedded browser is still unusable.

6

Part of the problem is rather simple:

http://i.imgur.com/okYLBXU.png

But it doesn’t seem to be enough to fix it. If I set this to 100, the browser still refuses to run higher than 63 fps and now has screen tearing.

7

Thank you for the additional information. As for updates the public link provided above can be used to check the status of the issue.

8

Where is fix??? Still very slow!

9

Why is the web widget very slow? I am running a website which used WebGL in the browser.