My scene is just some buttons, text, simple particles, and a fog shader background. It runs fine in the editor, but in a build it lags a LOT.
Do you happen to playing on a Macbook? The very high screen DPI is very taxing if you run the game in full screen.
The editor defaults to using the “low-resolution aspect ratios” option, which halves the resolution in play mode if you aren’t using a specific resolution.
This could also happen if you just have a high DPI display in general.
Nah not on a macbook, I found the issue. For some reason my URP settings were cranked up immensely high and it was trying to upscale and antialias everything to the max 