Hey, does anyone know how to solve this? When dragging to move around in any Blueprint editor, and when I run the game in PIE, or do anything in the editor (and occasionally even the Epic Games Launcher feels a bit sluggish too), the engine runs at an insanely low FPS. Sometimes it’s just PIE that’s slow, sometimes it’s both PIE and editing in BPs. I just restarted it and it feels a bit smoother than a few minutes ago, just checked the FPS stat, which says it’s currently running at 40 FPS, but I’ve played plenty of games at 30 FPS and they don’t stutter this badly, and not only that, this is a very small project and should run at the usual 120 FPS without any problems!
It’s been happening for a while, and it’s not every time, but it happens more often than not and with any project, I’ve also experienced it in 4.25, 4.26, and UE5, and can only seem to fix it by restarting my PC and getting lucky, which is infuriating! It’s been happening since I got the PC, which was brand new, and has a 3080 TI, 64 GB of RAM, i9 10900K, and is running the engine on an SSD, and also has no issues with any games I’ve tested all running on max settings, I literally only have this problem with Unreal Engine!
Here’s a video of what’s happening UE Editor Lag - YouTube After the restart, dragging around in the editor was fine so I didn’t manage to record that, so it’s just testing the project was stuttering for this example.
Hello,
Here are a few things that I suspect. If the project works fine when you open it up and gets worse by time that sounds like a tick issue. Make sure no events use tick unless they 100% need it.
Also there are a few profiling options that can help you check what the issue is.
As a quick check you can try running the game in unlit mode without any light actors or additional meshes, to see if the issue is visuals or logic.
Good luck
It happens on empty projects too, and it’s as soon as the project is opened, plus it lags in the editor before I even click play so it’s nothing to do with using the tick. Other times it works perfectly at 120 FPS on huge projects though, there doesn’t seem to be a consistent way to make it happen or not, it just seems to be random. Sometimes I can have other software open or even be playing a game on another screen and both will run with no issues, whereas other times the editor will be the first thing I open after turning on my PC so there’s nothing else that would be slowing it down, yet it will still stutter
Thats really unusual, this might be a hardware issue, maybe some malware. Have you checked the resource monitor in those situations? maybe that will tell you more
