We write Go for the parts the standard library leaves to you: the clipboard, the GPU, the compiler, the thread you are pinned to. Everything imports under golang.design/x/..., ships without a C toolchain wherever we can manage it, and tells you up front what it will not do.

Building things in the open since September 2020.

Write the kernel in a subset of Go. accel compiles it ahead of time and dispatches it to whatever the machine has, today the CPU or Metal.

//go:generate go tool accel-kernel .

//accel:kernel workgroup=64
func Scale(t accel.Thread, in []float32, out []float32) {
	i := t.GlobalID().X
	if i < uint32(len(out)) {
		out[i] = in[i] * 2
	}
}

go get golang.design/x/accel
go get -tool golang.design/x/accel/cmd/accel-kernel

The compute and tensor API is frozen, and the tensor layer targets inference, not training. Graphics runs on both backends and is still settling. Vulkan, D3D12, OpenGL and WebGPU are designed, not written.

Guide · pkg.go.dev

nanogo compiles Go source to a goobj file that go tool link links against the real Go runtime. You opt in per package, so the rest of your build still goes through gc.

go install golang.design/x/nanogo/cmd/nanogo@latest
echo main > allowlist
NANOGO_ALLOWLIST=./allowlist go build -toolexec=nanogo ./...

It turns down closures, append, type assertions, defer, maps and channels today, so most Go programs will not build, and a refusal names the function and the construct instead of emitting something wrong. The goal is to compile its own source.

Follow along · pkg.go.dev

• Go SSA Playground: paste Go, read the SSA the compiler builds from it
• bench: benchstat and perflock behind one command, so a benchmark run is performance-locked and statistically analyzed without extra flags
• redir: the redirector serving every golang.design/s/ link on this page
• code2img: turn a snippet into an image through the carbon.now.sh API, with an iOS Shortcut included
• tgstore: encrypted object storage with no size limit, backed by Telegram

• Go: Under The Hood: how the runtime, compiler and toolchain work, with the source in front of you
• Go: Questions: Go 程序员面试笔试宝典, the language taught through the questions interviewers ask
• Go: A Documentary: the talks, threads and design documents that got Go here
• golang.design/research: shorter notes on whatever we just ran into

Older experiments stay up rather than getting deleted: go2generics collected the Go 2 generics designs while they were still proposals.

Open an issue on the repository you are using. Bug reports that include the OS, the Go version and a program we can run are the ones that get fixed first. If you want to help build something instead, accel and nanogo are the two with the most surface left to cover.