Rendering more than 1 slider in the editor causes heavy performance issues

[piee-kun]

Type

Performance

Bug description

During editing, when more than one slider is being rendered (usually around 3-4 can cause massive drops), the FPS drops heavily. As far as my testing went, this does not occur with circles, and it doesn't occur in gameplay. Both Vulkan and D3D11 experience this issue, however FPS on Vulkan is less affected, as the base framerate is higher.

Screenshots or videos

4 sliders rendered

5 circles rendered

Version

2024.625.2

Logs

compressed-logs.zip

[Peter-io]

Same here

vs

Sliders really tank performance now

[peppy]

This is probably going to be from UpdateState being called (and now forcefully) every frame.

@bdach I think we'll just want to change the every-frame transforms to not be transforms as I touched on in the original PR. I don't think it will be hard to convert them to raw interpolations. Will take a look tomorrow unless you want to.

[piee-kun]

unsure if it's related, but I think fix in #28621 only fixes the problem temporarily. Recently I've left my editor open for ~1hr and my performance was really bad, sub 20fps bad

[piee-kun]

i'm not able to provide screenshots, out of panic i quit the map and reopened the editor.

EDIT: provided logs
compressed-logs.zip

[peppy]

@piee-kun to confirm, was that one hour of the editor open without using it at all? knowing the specifics will help us reproduce the issue.

[piee-kun]

@peppy correct, i went afk for an hour to do something and the editor was open in the background, i don't think it was tabbed in

[piee-kun]

i had once again gone afk, unsure for how long, but the problem how now returned when sliders were being rendered

8mb.video-vpz-aVBZblb7.-.Trim.mp4

compressed-logs.zip

[piee-kun]

[Peter-io]

This seems to be an issue on piee video and no sliders are selected

[piee-kun]

This seems to be an issuie on piee video and no sliders are selected

should also mention this ms value keeps increasing over time

[bdach]

I'll recheck again to be sure but I'm 99% sure the fix mentioned above just hasn't made a release yet.

[piee-kun]

ah, sorry, you might be correct. #28592 is included in latest release and i mightve confused it with #28621

[piee-kun]

i was entirely under the impression that it was in release, my apologies.

[bdach]

Have left the game running in background for 1 hour on master and cannot reproduce this, so I'm going to just claim that this was fixed but just hasn't made a release as per above until proven otherwise.