Question by baconomist · Sep 25, 2020 at 02:27 PM · editor slow compiler assembly

Unity Entering Play Mode Taking 24s In Empty Project

Suddenly my Unity Editor has decided to become extremely slow when entering play mode in an empty project and I have no idea why.

Steps To Reproduce:

Create an empty unity project using unity 2019.4.11f1 LTS
Press the play button

Issue:

Pressing the play button causes unity to freeze for about 24s due to assembly reloading.

I have tried everything from:

Changing unity versions
Creating a new project
Resetting unity to factory defaults
Resetting packages to defaults
Rebooting my computer
Updating windows
Updating visual studio

My desktop computer itself doesn't freeze for 24s when entering play mode, only unity. My CPU(i5-4670K) is only at 40% usage, I have 16GB of ram, and an SSD therefore I don't believe the hardware is an issue. In addition, Unity enters play mode just fine on my laptop which is less powerful than my desktop.

As I have mentioned, this is a recent issue as prior to this unity would run just fine on my desktop.

Using the unity profiler I can see that "ReloadingAssembly" is the culprit, taking 19s to complete. alt text