.NET core app hosted on azure first request very slow

Question

I have an issue with my .NET core app hosted on Azure. Everything works fine in production but the first request after an inactivity period is very very slow (sometimes up to 10-15 seconds).

I don't get where the issue comes from because it didn't happened previously when I was hosting the app on DigitalOcean.

I added below some screenshots of the app on Azure. Could you please let me know if anyone of you already met a similar issue?

Thanks a lot!

App Service Details

Linux Plan Details

Slow Request Example

App Service Configuration

Answer 1

I know it's a bit late but you can prevent the app to go idle with this setting:

Settings >> Configuration >> Always on: On