Hello. Was working on my project and out of nowhere it is became very slow to enter play mode. In the past it took no more than 5 seconds, but now it takes 15 seconds.
I created new empty 3D project to test it and have the same lag for the same 15 seconds without any code, assets or packages included.
I am using Unity 2018.4.23f1 more than a month now, it was working perfectly before.
I cannot switch version because it’s work project and whole company use this version.
On my other projects with different Unity versions (2019 for example) game enters play mode as smooth as always.
I was trying to use Editor Profiler to check what is taking so long, most of it is in “Reload assembly” → “ClassLibraryInitializer”
Providing some context from Editor.log. It was tested on empty project.
Reloading assemblies for play mode.
Begin MonoManager ReloadAssembly
Initializing Unity.PackageManager (PackageManager) v2018.4.23 for Unity v2018.4.23f1
Registering platform support modules:
Registered platform support modules in: 0,3199714s.
Native extension for WindowsStandalone target not found
Refreshing native plugins compatible for Editor in 2.17 ms, found 1 plugins.
Preloading 1 native plugins for Editor in 0.18 ms.
Mono: successfully reloaded assembly
- Completed reload, in 13.013 seconds
Platform modules already initialized, skipping
Load scene ‘Temp/__Backupscenes/0.backup’ time: 0.336670 ms
Setting up 2 worker threads for Enlighten.
Thread → id: 1024 → priority: 1
Thread → id: 18dc → priority: 1
Load scene ‘Temp/__Backupscenes/0.backup’ time: 0.331705 ms
Unloading 26 Unused Serialized files (Serialized files now loaded: 0)
System memory in use before: 492.8 MB.
System memory in use after: 492.9 MB.
Unloading 27 unused Assets to reduce memory usage. Loaded Objects now: 1257.
Total: 11.540476 ms (FindLiveObjects: 0.425724 ms CreateObjectMapping: 0.035063 ms MarkObjects: 10.990013 ms DeleteObjects: 0.087813 ms)
[00:00:00] Enlighten: Precompute started.
[PathTracer] building lightmap data asset.
[00:00:00] Enlighten: Finished 1 Layout Systems job (0.00s execute, 0.00s integrate, 0.06s wallclock)
[00:00:00] Enlighten: Finished 1 Tetrahedralize Probes job (0.00s execute, 0.00s integrate, 0.05s wallclock)
[00:00:00] Enlighten: Precompute took 0.117027 seconds.
Enlighten scene contents: 0 geometries. 0 instances. 0 systems. 0 probe groups. 0 cube maps. Scene is up-to-date.
Unloading 2 Unused Serialized files (Serialized files now loaded: 0)
System memory in use before: 0.60 GB.
System memory in use after: 0.60 GB.