Unity 2022.3.4f1 - Slow to open projects

Unity Engine
1

I put this post under Question, but not sure if it’s actually a bug.
My project is a new prototype and very minimal - about 10 scripts, 5 materials, 1 small model. URP, Cinemachine, New Input.

Whenever I open it (after a PC restart or sleep) it can take a several minutes to load.
I noticed a few things in the Editor log taking relatively long time:

  • Domain Reload Profiling: 5392ms

  • Then another Domain Reload Profiling: 11716ms

  • Asset Pipeline Refresh (id=c3ba194a1643b164291b40babf2363d2): Total: 115.525 seconds (most of it “Untracked”, and another Domain Reload in there?).

I mostly wanted to ask whether this is expected in 2022?
It definitely wasn’t like that on older versions (2021 opened faster for me with a full-fledged game with hundreds of assets), but I’m not sure if I have something set up wrong or if 2022 is just slower.

(I have an i9, 32GB and an SSD, so unlikely a hardware issue)

(also as an aside I think it would be really helpful if timings were standardised - either as 0.5s or 500ms - to be able to analyse logs faster)

Asset Pipeline Refresh (id=c3ba194a1643b164291b40babf2363d2): Total: 115.525 seconds - Initiated by InitialRefreshV2(ForceSynchronousImport)
    Summary:
        Imports: total=0 (actual=0, local cache=0, cache server=0)
        Asset DB Process Time: managed=0 ms, native=97449 ms
        Asset DB Callback time: managed=26 ms, native=0 ms
        Scripting: domain reloads=1, domain reload time=11809 ms, compile time=6187 ms, other=52 ms
        Project Asset Count: scripts=3773, non-scripts=1285
        Asset File Changes: new=0, changed=0, moved=0, deleted=0
        Scan Filter Count: 0
    InvokeBeforeRefreshCallbacks: 0.314ms
    ApplyChangesToAssetFolders: 0.059ms
    Scan: 10326.699ms
    OnSourceAssetsModified: 0.004ms
    GetAllGuidsForCategorization: 0.944ms
    CategorizeAssets: 149.671ms
    ImportOutOfDateAssets: 6116.883ms (-88.198ms without children)
        CompileScripts: 6187.301ms
        ReloadNativeAssets: 0.013ms
        UnloadImportedAssets: 15.907ms
        EnsureUptoDateAssetsAreRegisteredWithGuidPM: 1.031ms
        InitializingProgressBar: 0.011ms
        PostProcessAllAssetNotificationsAddChangedAssets: 0.000ms
        OnDemandSchedulerStart: 0.820ms
    PostProcessAllAssets: 26.288ms
    GatherAllCurrentPrimaryArtifactRevisions: 0.001ms
    UnloadStreamsBegin: 0.992ms
    PersistCurrentRevisions: 0.151ms
    UnloadStreamsEnd: 0.014ms
    GenerateScriptTypeHashes: 1.696ms
    Untracked: 98903.459ms

There’s also the Domain Reload:

Domain Reload Profiling: 11716ms
    BeginReloadAssembly (123ms)
        ExecutionOrderSort (0ms)
        DisableScriptedObjects (5ms)
        BackupInstance (0ms)
        ReleaseScriptingObjects (0ms)
        CreateAndSetChildDomain (22ms)
    RebuildCommonClasses (30ms)
    RebuildNativeTypeToScriptingClass (10ms)
    initialDomainReloadingComplete (22ms)
    LoadAllAssembliesAndSetupDomain (5471ms)
        LoadAssemblies (5349ms)
        RebuildTransferFunctionScriptingTraits (0ms)
        AnalyzeDomain (187ms)
            TypeCache.Refresh (166ms)
                TypeCache.ScanAssembly (158ms)
            ScanForSourceGeneratedMonoScriptInfo (13ms)
            ResolveRequiredComponents (8ms)
    FinalizeReload (6059ms)
        ReleaseScriptCaches (0ms)
        RebuildScriptCaches (0ms)
        SetupLoadedEditorAssemblies (4818ms)
            LogAssemblyErrors (0ms)
            InitializePlatformSupportModulesInManaged (4ms)
            SetLoadedEditorAssemblies (3ms)
            RefreshPlugins (0ms)
            BeforeProcessingInitializeOnLoad (68ms)
            ProcessInitializeOnLoadAttributes (4658ms)
            ProcessInitializeOnLoadMethodAttributes (82ms)
            AfterProcessingInitializeOnLoad (2ms)
            EditorAssembliesLoaded (0ms)
        ExecutionOrderSort2 (0ms)
        AwakeInstancesAfterBackupRestoration (4ms)
2

Have you tried deleting the Library folder?

Also check that the project root folder is excluded from Antivirus, including Windows Defender and possibly other “scanner” or “cleaner” tools.

3

Thanks for the suggestions, unfortunately neither really “fixed” it.
Still spends a lot of time loading the project, most of it “Untracked”, with three different “domain reload”.

4

don’t use 2022.3LTS，it is more slower, I regreted use it

5

Very informative. How about providing some measurements, even stopwatch timings?

Have you tried 2023.1?

6

This is still the issue with 2022.3.16 LTS. I am on 20mins + with opening a new 2d URP template. This is fresh project.

7

Does your Unity Engine and project reside on an SSD? It really helps.