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ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.
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File > New Blazor WASM first load takes over 8 minutes #37509

Closed WestDiscGolf closed 3 years ago

WestDiscGolf commented 3 years ago

Describe the bug

After upgrading to .NET 6 rc 2 (6.0.100-rc.2.21505.57) the first load of a Blazor wasm client takes 8+ minutes.

Initially raised on twitter - https://twitter.com/WestDiscGolf/status/1448029414915256327

To Reproduce

  1. On terminal, create temp folder
  2. Navigate into created folder (from step 1)
  3. Run dotnet new blazorwasm -o Client
  4. Wait for new Blazor project to be completed
  5. cd .\Client
  6. Run dotnet run
  7. Browse to address which is displayed in the terminal
  8. Go into Incognito mode to reproduce

image

Further technical details

dotnet --info Output .NET SDK (reflecting any global.json): Version: 6.0.100-rc.2.21505.57 Commit: ab39070116 Runtime Environment: OS Name: Windows OS Version: 10.0.18363 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\6.0.100-rc.2.21505.57\ Host (useful for support): Version: 6.0.0-rc.2.21480.5 Commit: 6b11d64e7e .NET SDKs installed: 2.2.401 [C:\Program Files\dotnet\sdk] 3.1.301 [C:\Program Files\dotnet\sdk] 3.1.412 [C:\Program Files\dotnet\sdk] 5.0.103 [C:\Program Files\dotnet\sdk] 5.0.401 [C:\Program Files\dotnet\sdk] 6.0.100-preview.6.21355.2 [C:\Program Files\dotnet\sdk] 6.0.100-rc.1.21463.6 [C:\Program Files\dotnet\sdk] 6.0.100-rc.2.21505.57 [C:\Program Files\dotnet\sdk] .NET runtimes installed: Microsoft.AspNetCore.All 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.19 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 5.0.1 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 5.0.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 5.0.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 5.0.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 6.0.0-preview.6.21355.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 6.0.0-rc.2.21480.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.18 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.19 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 6.0.0-preview.5.21301.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 6.0.0-preview.6.21352.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 6.0.0-rc.2.21480.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 3.1.18 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 3.1.19 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 5.0.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 5.0.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 5.0.9 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 5.0.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 6.0.0-preview.5.21301.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 6.0.0-preview.6.21353.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 6.0.0-rc.2.21501.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
SteveSandersonMS commented 3 years ago

I'm afraid this issue doesn't occur when I try it. Also it's strange that your screenshot shows 22.4 MB transferred while for me it's 8.5MB (it ~2MB after publish of course, but that's not applicable to the issue you're describing).

Is it possible that something else is going on with your PC? Might there be some browser extension (or nonstandard network config) interfering? Are you able to reproduce this on a different web browser and/or PC?

WestDiscGolf commented 3 years ago

The "nonstandard network config" suggestion initially pointed me at my corporate VPN connection. However that does not seem to make a difference.

I don't have access to another machine at the moment to try so the next best thing I could do was to make sure there were no potential clashes between versions. So I've add/removed programs and removed all the .NET 6 previews that I could there other than the rc2 and then manually went to the folder locations and deleted the contents of any .NET 6 related folders (again, not the rc2 folder).

I have then run the same steps to reproduce and it still brings down the 20+MB but a lot quicker. I can only put it down to the some sort of clash of versions or something.

Thanks for looking into the issue and sorry for wasting your time.