Faster hyper-v container startup time about windows-containers

[fady-azmy-msft]

Hey @JensNordenbro, are these startup times the first container startup times? If not, how long do the n+1 containers take? The first container startup usually takes extra time.

[JensNordenbro]

Running:
1>docker run -it mcr.microsoft.com/dotnet/sdk:8.0.203-nanoserver-1809 cmd.exe /c:exit
takes 3 seconds on my machine , similar result all times.

2>docker run -it mcr.microsoft.com/dotnet/sdk:8.0.203-windowsservercore-ltsc2019 cmd.exe /c:exit
takes 19s on my machine , similar result all times.

3>docker run -it mcr.microsoft.com/dotnet/sdk:8.0.203-windowsservercore-ltsc2019 cmd.exe /c:exit
takes 5s on my machine , similar result all times.