Example performance at higher resolutions

[jdswebb]

When I increase the resolution of the examples (tested on Physics and SkeletalAnimation) I go from a steady 60fps at the default resolution, to an unstable 20-30fps at 1440p. This doesn't seem right for such simple scenes.

I'm using a 1080 GTX - curious if you can repro this or if it's some oddity with my machine.

[BearishSun]

Which platform are you running on, and which render API backend are you using? (DirectX is default on Windows, OpenGL on Linux/macOS if you haven't changed it). This is 1440p in windowed or fullscreen mode? (should be windowed unless you changed the examples)

I don't have a 1440p monitor to test this properly but I'll see if I can notice a performance drop with higher resolutions once I know the info above.

[jdswebb]

Yeah sorry this is on Windows with everything else unchanged - so windowed and DirectX.

It gets choppy for me even at 1080p - FPS shows as about 50 but it's not smooth.

[BearishSun]

It stays well above 60 for me at 1080p, but I do notice an unreasonable FPS drop with resolution increase. I'll let you know when I track it down.

[BearishSun]

MSAA seems to be the biggest culprit, with 5x fps boost with it disabled. It's partly expected but I'm not sure if its reasonable for the difference to be so large - when I get more time I'll dig deeper and see if there's anything going wrong, bsf should be smart and only multisample parts of the image that benefit from it.

SSR is second biggest culprit. You can probably get away with reducing its settings a bit, I haven't really tweaked the default settings to best performance/quality ratio.

The good news is that performance shouldn't drop as much with scene complexity, as the biggest hitters are screen space effects, meaning the resolution is the largest influencer to performance.

[athanase]

Hi there,
I am running under Linux with the nvidia drivers version 396.24 and I use the Vulkan backend.
I do have a 1440p screen and I had performance issues with MSAA.
I reduced the number of samples to get 60 fps. Moreover the MSAA won't work with lots of samples since the texture size is too large for the driver itself.

[BearishSun]

I did make some performance improvements since this thread was opened, and I'm still looking into a few potential problem areas.