Founder of WarpBuild here. Our arm64 runners are ~2x faster than Blacksmith. This is because we use a newer generation of more powerful instances. If you're bu

Founder of WarpBuild here. Our arm64 runners are ~2x faster than Blacksmith. This is because we use a newer generation of more powerful instances. If you're building multi arch images, here is a page that may be useful: https://docs.warpbuild.com/docker-builders#multi-platform-builds https://docs.warpbuild.com/docker-builders#multi-platform-bu... We natively support multi platform builds in our drop in replacement action.