Very slow app startup

[mu88]

• Version: 0.4.0

• .NET SDK / runtime: 10.0.102 / 10.0.2

• Target: win-x64

Starting my Electron.NET app takes between 60 s and 90 s 🐌 I've already excluded both the app's path and the EXE itself from Windows Defender - barely any difference on three different Win11 machines.

Furthermore, I've started the app via the perf profiler JetBrains dotTrace, but all the time seems to be spent in the unmanaged world:

Steps to Reproduce:

1. Clone the repo https://github.com/mu88/BlazorFotoManager/.
2. Run dotnet publish FotoManager\FotoManager.csproj /p:PublishProfile=win-x64
3. Run the built and packaged app FotoManager\publish\Release\net10.0\win-x64\FotoFlipper_3.0.1.exe

[GregorBiswanger]

A common problem with Electron on Windows is a delayed startup time. This isn’t caused by Electron or Electron.NET.

Windows Defender intentionally slows down unsigned Electron apps because it performs extra checks for potentially malicious behavior.

Try adding your app to Windows Defender’s exclusion list, or temporarily disable Defender, and then let me know how the performance looks. Normally, that should resolve the issue.

[mu88]

Didn't I already do that?

I've already excluded both the app's path and the EXE itself from Windows Defender - barely any difference on three different Win11 machines.