Hello,
We are working on a project with Unity 2018.4.10f1 and in some circumstance, the Editor become very slow. It happen when we are running the game inside the editor, going in a gameplay scene, and then stop.
Unity become very slow at this point, it take a lot of time updating Editor UI, or resizing windows. We used the profiler when trying to resize one of the window one this the the result :
The function TextureStremingManager.ResetMipLevels take a lot of time. Profiling with visual give the same result. As the project is not ours, we don’t really know all the code yet and what it is doing, so don’t know where to look for wat could be causing this behaviour.
The bug wasn’t here on version 2018.2.x. We also tested on 2018.4.12, where it happen. 2019 version don’t have the bug, but we can’t use it. We also tested the Editor in OpenGL mode without success. We found out that recompiling scripts and reloading a scene remove the freeze until next play/stop. And while the game is running in the editor, there is no slow down.
Any help would be welcome for where to look.