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Are you building on arm64 natively or via qemu. A few mins vs 35 for the same roughish spec of CPU, seems a bit off, even with optimisation considerations.

I've found arm64 builds on amd64 take longer when using one build context/arch (but doing multiple platforms), but that's as it's being emulated.

It's the oppostite on my M1, the buildx amd64 takes longer.

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oh it was with buildx (which uses qemu) as GitHub Actions run in x64. I was showing a specific example of arm64 build tooling challenges small startups encounter (Github Actions lack of arm job runners in this case). My arm64 builds on arm64 architecture scream.

You can do a self hosted runner on arm though, even on a Raspberry Pi (if inclined), so not sure it's prohibitively expensive to a startup, could even afford a spot graviton :D

I've got to say though, I've not experience that delta in build times, even emulated on my machine.

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