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The depot.dev service has excellent caching for docker. It's almost like building locally.

Though the site (depot.dev) focuses on that aspect, this post doesn't.

@jacobwg - Do the runners in AWS get the same docker caching performance as depot.dev hosted runners?

At the moment, I think you'd want to use both products together, i.e. using `depot build` in place of `docker build` to move the container build portion to a Depot container builder.

I'd like to have a more automatic integration at some point - the challenge is that a lot of BuildKit's architecture performs best when many different build requests all arrive at a single build host, it is then able to efficiently deduplicate and cache work across all those build requests. So you really want the many different Actions jobs all communicating with the same BuildKit host.

We have some ideas for reducing the amount of change to Actions workflows to adopt ^ - longer term we're also working on our own build engine, to free those workloads from being confined to single hosts (be that single CI runners or single container builders).

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