Somehow, there is an exact 2s delay from nameserver resolution to connection setup

[buehler]

Describe the bug
I've been experimenting with a local grpc server when I saw that each call needs exactly around 2 seconds.
Between "resolution stop" and "connection established" there is a 2s delay for no reason. When I tried the same call in Insomnia gRPC, it was nearly instant.

To Reproduce
Steps to reproduce the behavior:

1. Have a grpc server
2. Create a call
3. Send call :)

Expected behavior
That it should be blazingly fast

Screenshots

Environment (if possible, copy the information from the error dialog or the About menu):

• OS: Win 11
• Kreya Version: 1.7.0 Stable

[buehler]

{
"kreyaVersion": "1.7.0",
"platform": "Win32",
"userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36 Edg/99.0.1150.30"
}

[CommonGuy]

I cannot reproduce this:

Could you try calling your API via http://127.0.0.1:8080 and http://[::1]:8080? I suspect IPv6 issues when resolving localhost, where Kreya tries to connect to the "IPv6 IP", but has to fall back to the "IPv4 IP".

[buehler]

Huhu :)

Yep, when I use 127.0.0.1 it is blazingly fast.

[CommonGuy]

Ok, then that's the workaround for now...

As for improving this, we are blocked until dotnet/runtime#26177 has been implemented into the .NET "gRPC infrastructure" (mainly HttpClient/SocketsHttpHandler).