Does a cloud-docker private repo sleep like Heroku dynamo?

Question

I know that a free Heroku Dynamo sleeps after 30 minutes of inactivity. I can notice a significant start-up time for the first request.

Does the same apply to a free private repo on cloud.docker.com?
For my hobby project, which is better?

Answer 1

A classic private registry should not sleep.

You have different hosting services for (one free) private registry: "Comparing Four Hosted Docker Registries" (docker Hub, Quay.io, Artifactory, Google Cloud), and none appear to have that issue as well.