When I run go build main.go, my understanding is that Go compiles each dependency into an object file, caches it, and then links them all to generate the final executable.

Is there a way to precompile all the packages listed in go.mod before building my app, so that their object files are already cached?

I'm asking because I want to speed up Docker image builds by separating the dependency compilation from the app build step, which would allow those layers to be cached more effectively.

FROM golang:1.23

COPY go.mod go.sum /src/ # cached
RUN go mod download -x # cached

RUN compile-dependencies-only # cached

COPY . /src
RUN go build ./main.go