Why perfomance is so poor?

Development Platform & Builds
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1

Hello. I’m facing the trouble: I have only ~20FPS in a Viewport with a simple scene (without local light sources, textures, etc).

When I used 4.22 I used key -opengl4 as temporary workaround (it increased value to ~50FPS). However in 4.23 opengl4 is deprecated.

At the same time on Win10 I have stable 60FPS with same hardware staff ;-(

I tried some advices from sections Known Linux Issues and Running On Linux.
I also found same theme, but I don’t use debug version (I compiled it via make without any extra parameters).

Here is my system-info:

HP Probook G450 G5
8x i7-8550U @ 1.80 GHz
8GB RAM (usually free ~2.5-3GB GB with launched UE4)

Nvidia GeForce 930MX/PCIe/SSE2
    NVIDIA Driver Version: 430.40
    OpenGL Settings: setted to Max Perfomance
    OpenGL Version 4.6.0 NVIDIA 430.40
    Antialising: OFF
    Power Mitzer: Prefer Maximum Perfomance
    Prime Profile: Maximum Perfomance

    OS KDE Neon 5.16
        Plasma: 5.16.5
        Qt: 5.12.3

Option “Allow Application to Block Compositioning” also checked
(without that option situation with FPS even worse)

$ sudo perf record -a -g sleep 60
[ perf record: Woken up 29 times to write data ]
[ perf record: Captured and wrote 8.839 MB perf.data (58737 samples) ]

Any ideas what’s wrong?
Please, help.

Thanks!

2

Ok, I changed settings in BaseEngine.ini and started editor with opengl4 target and FPS were increased to ~45-50

3

Well, I just unchecked “Realtime” and now have stable ~60FPS

4

Some results on 3rd person scene (default template):

  • ShaderModel 4, ShaderModel 5 + LOW Engine Scalability Settings = 30FPS (Vulkan target)
  • SharedModel 5, ShaderModel 5 + CINEMATIC Engine Scalability Settings = 20FPS (Vulkan target)
  • Android ES 3.1 + CINEMATIC Engine Scalability Settings = stable 60FPS (Vulkan target)
5

(fix: SharedModel 4, ShaderModel 5 + CINEMATIC Engine Scalability Settings = 20FPS (Vulkan target)

6

In the same time that scene has ~50-60FPS with forced -opengl4 target

7

Well, it would be cool to disable annoying message that OpenGL4 is deprecated for every launching. Enough to do it once with first lodaing

8

I’ve updated nvidia proprietary driver from v430.49 to 430.50 and FPS was incrased up to 33-37 FPS (and stable 50FPS in gamepreview) for vulkan target.

(also some benchmarks tells, that nvidia proprietary drviers have a better perfomance with opengl4 than with vulkan for cards 900-series. It is issue for nvidia)