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rubyvideo.dev has a GitHub action to deploy with Kamal. On a warm cache it takes about 5min to build and deploy. On a cold cache it can take up to 25min. I know GitHub runners are slow, but are those numbers normal ? If you have some ideas of improvements github.com/adrienpoly/r...

That seems rather a lot still. We recently set up GHA deployment of a (smallish) rails app through Kamal with 2m (warm) and 5m (cold) deploys. The docker build cache made the biggest difference, let me find the code.

Got it, it was the two lines after setting up docker buildx. As far as I understood it, without them the GHA cache actually is not used for docker builds caching in Kamal. I originally found this trick here: jetthoughts.com/blog/automat...