# Wasm3 [](https://wapm.io/package/vshymanskyy/wasm3) [](https://github.com/wasm3/wasm3/issues) [](https://github.com/wasm3/wasm3/actions) [](https://github.com/wasm3/wasm3) The fastest WebAssembly interpreter, and the most universal runtime. _{Based on [**CoreMark 1.0** benchmark](./docs/Performance.md). Your mileage may vary.} [](https://twitter.com/wasm3_engine) [](https://discord.gg/qmZjgnd) [](https://t.me/joinchat/DD8s3xVG8Vj_LxRDm52eTQ) ## Getting Started Here's an online demo and a small [getting started guide](https://wapm.io/package/vshymanskyy/wasm3): [](https://webassembly.sh/?run-command=wasm3) ## Installation **Please follow the [installation instructions](./docs/Installation.md).** Wasm3 can also be used as a library for: [ Python3](./platforms/python) │ [ C/C++](https://github.com/wasm3/wasm3) │ [ GoLang](https://github.com/matiasinsaurralde/go-wasm3) │ [ Rust](https://github.com/Veykril/wasm3-rs) │ [ Swift](https://github.com/shareup/wasm-interpreter-apple) │ [ .Net](https://github.com/tana/Wasm3DotNet) │ [　 Zig](https://github.com/alichay/zig-wasm3) │ [ Arduino, PlatformIO, Particle](https://github.com/wasm3/wasm3-arduino) ## Status `wasm3` passes the [WebAssembly spec testsuite](https://github.com/WebAssembly/spec/tree/master/test/core) and is able to run many `WASI` apps. Minimum useful system requirements: **~64Kb** for code and **~10Kb** RAM `wasm3` runs on a wide range of architectures (`x86`, `x86_64`, `ARM`, `RISC-V`, `PowerPC`, `MIPS`, `Xtensa`, `ARC32`, ...) and [platforms](/platforms): - Linux, Windows, OS X, FreeBSD - Android, iOS - **OpenWRT**-enabled routers - Raspberry Pi, Orange Pi and other **SBC**s - **MCU**s: Arduino, ESP8266, ESP32, Particle, ... [see full list](./docs/Hardware.md) - Browsers... yes, using WebAssembly itself! - `wasm3` can execute `wasm3` (self-hosting) ## Advanced features and [post-mvp proposals](https://github.com/WebAssembly/proposals) support ☑ Sign-extension operators ☑ Non-trapping float-to-int conversions ☑ Structured execution tracing ☑ Self-hosting ☑ Gas metering ☐ Multi-value ☐ Bulk memory operations ☐ Reference types ☐ Tail call optimization ☐ Fixed-width SIMD ## Motivation **Why use a "slow interpreter" versus a "fast JIT"?** In many situations, speed is not the main concern. Runtime executable size, code density, memory usage, startup latency can be all improved with the interpreter approach. Portability and security are much easier to achieve and maintain. Additionally, development impedance is much lower. A simple library like Wasm3 is easy to compile and integrate into an existing project. (Wasm3 builds in a just few seconds). Finally, on some platforms (i.e. iOS and WebAssembly itself) you can't generate executable code pages in runtime, so JIT is unavailable. **Why would you want to run WASM on microcontrollers?** Wasm3 started as a research project and remains so by many means. Evaluating the engine in different environments is part of the research. Given that we have `Lua`, `JS`, `Python`, `Lisp`, `...` running on MCUs, `WebAssembly` is actually a promising alternative. It provides toolchain decoupling as well as a completely sandboxed, well-defined, predictable environment. Among practical use cases we can list `edge computing`, `scripting`, running `IoT rules`, `smart contracts`, etc. ## Used by [](https://wasmcloud.dev/)　 [](https://wowcube.com/)　 [](https://scailable.net/)　 [](https://github.com/balena-io-playground/balena-wasm3)　 [](https://github.com/deislabs/krustlet-wasm3)　 [](https://shareup.app/blog/introducing-shareup/)　 [](https://github.com/saghul/txiki.js)　 ## Further Resources [Demos](./docs/Demos.md) [Installation instructions](./docs/Installation.md) [Build and Development instructions](./docs/Development.md) [Supported Hardware](./docs/Hardware.md) [Testing & Fuzzing](./docs/Testing.md) [Performance](./docs/Performance.md) [Interpreter Architecture](./docs/Interpreter.md) [Logging](./docs/Diagnostics.md) [Awesome WebAssembly Tools](https://github.com/vshymanskyy/awesome-wasm-tools/blob/main/README.md) ### License This project is released under The MIT License (MIT)