Noticeable lag while starting and stopping Ktor

[Aditya94A]

I've noticed that (even in hello world projects)

• After starting the server, it takes 4-5 seconds for it to start accepting API calls on localhost
• Upon stopping the server, the process often lingers around for another 5-6 seconds showing the below icon 👇

Now this may not sound like much, but starting and stopping every day hundreds of times, this could easily get very annoying. (This is on a 2019 i9 4.5Ghz Macbook Pro)

So I wonder, if I'm missing something or whether this is something that everyone faces? Is there a way to fix this?

[Koriit]

I think it is very likely caused by the engine underneath. Which one are you using? Personally, I have experienced something similar with Netty and Jetty engines. CIO seems to start/stop almost instantly.

[22f]

CIO seems to start/stop almost instantly.

Nope. On my different devices with macOS, windows, linux I meet this problems with CIO engine too. So, I see INFO Application - Application started: io.ktor.application.Application in log, but app start accept requests 4-5 seconds later. As workaround we can make some healthcheker inside, and after success call to itself write smth at log, but want to understand the nature of this problem.

[oleg-larshin]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.

[Stexxe]

Are able to still reproduce that problem?