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WASI support in Go (go.dev)

submitted 11 months ago by [email protected] to c/[email protected]

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Go 1.21 adds a new port targeting the WASI preview 1 syscall API through the new GOOS value wasip1. This port builds on the existing WebAssembly port introduced in Go 1.11.

WebAssembly (Wasm) is a binary instruction format originally designed for the web. It represents a standard that allows developers to run high-performance, low-level code directly in web browsers at near-native speeds.

Go first added support for compiling to Wasm in the 1.11 release, through the js/wasm port. This allowed Go code compiled using the Go compiler to be executed in web browsers, but it required a JavaScript execution environment.

As the use of Wasm has grown, so have use cases outside of the browser. Many cloud providers are now offering services that allow the user to execute Wasm executables directly, leveraging the new WebAssembly System Interface (WASI) syscall API.

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