cranelift/README.md

<div align="center">
  <h1><code>wasmtime</code></h1>

  <p>
    <strong>A standalone runtime for
    <a href="https://webassembly.org/">WebAssembly</a></strong>
  </p>

  <strong>A <a href="https://bytecodealliance.org/">Bytecode Alliance</a> project</strong>

  <p>
    <a href="https://github.com/bytecodealliance/wasmtime/actions?query=workflow%3ACI"><img src="https://github.com/bytecodealliance/wasmtime/workflows/CI/badge.svg" alt="build status" /></a>
    <a href="https://bytecodealliance.zulipchat.com/#narrow/stream/217126-wasmtime"><img src="https://img.shields.io/badge/zulip-join_chat-brightgreen.svg" alt="zulip chat" /></a>
    <img src="https://img.shields.io/badge/rustc-1.37+-green.svg" alt="min rustc" />
  </p>

  <h3>
    <a href="https://bytecodealliance.github.io/wasmtime/">Guide</a>
    <span> | </span>
    <a href="https://bytecodealliance.github.io/wasmtime/contributing.html">Contributing</a>
    <span> | </span>
    <a href="https://wasmtime.dev/">Website</a>
    <span> | </span>
    <a href="https://bytecodealliance.zulipchat.com/#narrow/stream/217126-wasmtime">Chat</a>
  </h3>
</div>

## Installation

The Wasmtime CLI can be installed on Linux and macOS with a small install
script:

```sh
$ curl https://wasmtime.dev/install.sh -sSf | bash
```

Windows or otherwise interested users can download installers and
binaries directly from the [GitHub
Releases](https://github.com/bytecodealliance/wasmtime/releases) page.

## Example

If you've got the [Rust compiler
installed](https://www.rust-lang.org/tools/install) then you can take some Rust
source code:

```rust
fn main() {
    println!("Hello, world!");
}
```

and compile/run it with:

```sh
$ rustup target add wasm32-wasi
$ rustc hello.rs --target wasm32-wasi
$ wasmtime hello.wasm
Hello, world!
```

## Features

* **Lightweight**. Wasmtime is a standalone runtime for WebAssembly that scales
  with your needs. It fits on tiny chips as well as makes use of huge servers.
  Wasmtime can be embedded into almost any application too.

* **Fast**. Wasmtime is built on the optimizing [Cranelift] code generator to
  quickly generate high-quality machine code at runtime.

* **Configurable**. Whether you need to precompile your wasm ahead of time,
  generate code blazingly fast with Lightbeam, or interpret it at runtime,
  Wasmtime has you covered for all your wasm-executing needs.

* **WASI**. Wasmtime supports a rich set of APIs for interacting with the host
  environment through the [WASI standard](https://wasi.dev).

* **Standards Compliant**. Wasmtime passes the [official WebAssembly test
  suite](https://github.com/WebAssembly/testsuite), implements the [official C
  API of wasm](https://github.com/WebAssembly/wasm-c-api), and implements
  [future proposals to WebAssembly](https://github.com/WebAssembly/proposals) as
  well. Wasmtime developers are intimately engaged with the WebAssembly
  standards process all along the way too.

[Cranelift]: https://github.com/bytecodealliance/wasmtime/blob/master/cranelift/README.md

## Documentation

[📚 Read the Wasmtime guide here! 📚][guide]

The [wasmtime guide][guide] is the best starting point to learn about what
Wasmtime can do for you or help answer your questions about Wasmtime. If you're
curious in contributing to Wasmtime, [it can also help you do
that][contributing]!.

[contributing]: https://bytecodealliance.github.io/wasmtime/contributing.html
[guide]: https://bytecodealliance.github.io/wasmtime

---

It's Wasmtime.