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https://github.com/wasm3/wasm3

🚀 A fast WebAssembly interpreter and the most universal WASM runtime
https://github.com/wasm3/wasm3

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🚀 A fast WebAssembly interpreter and the most universal WASM runtime

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README 

        

> [!NOTE]

> I regret to inform the community that since [my house was destroyed by russians who invaded my country](https://twitter.com/vshymanskyy/status/1568657607229075456), **Wasm3 will enter a minimal maintenance phase**. At this time, I am unable to continue the development of new features. However, I am committed to keeping the project alive and will actively review and merge incoming Pull Requests. I deeply appreciate your understanding and support during this difficult period. **Your contributions to Wasm3 are now more valuable than ever.**






#  Wasm3



[![StandWithUkraine](https://raw.githubusercontent.com/vshymanskyy/StandWithUkraine/main/badges/StandWithUkraine.svg)](https://github.com/vshymanskyy/StandWithUkraine/blob/main/docs/README.md) 

[![GitHub issues](https://img.shields.io/github/issues-raw/wasm3/wasm3?style=flat-square&label=issues&color=success)](https://github.com/wasm3/wasm3/issues) 

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[![Fuzzing Status](https://img.shields.io/badge/oss--fuzz-fuzzing-success?style=flat-square)](https://bugs.chromium.org/p/oss-fuzz/issues/list?can=1&q=proj:wasm3) 

[![GitHub license](https://img.shields.io/badge/license-MIT-blue?style=flat-square)](https://github.com/wasm3/wasm3) 



A fast WebAssembly interpreter and the most universal WASM runtime.  

Based on [**CoreMark 1.0**](./docs/Performance.md) and [**independent**](https://00f.net/2021/02/22/webassembly-runtimes-benchmarks) benchmarks. Your mileage may vary.



[![X (formerly Twitter) Follow](https://img.shields.io/twitter/follow/wasm3_engine)](https://twitter.com/wasm3_engine) 

[![Discord](https://img.shields.io/discord/671415645073702925?style=social&logo=discord&color=7289da&label=discord)](https://discord.gg/qmZjgnd)



## Installation



**Please follow the [installation instructions](./docs/Installation.md).**



Wasm3 can also be used as a library for:



[ Python3](https://github.com/wasm3/pywasm3) │ 

[ Rust](https://github.com/wasm3/wasm3-rs) │ 

[ C/C++](https://github.com/wasm3/wasm3) │ 

[ D](https://github.com/kassane/wasm3-d) │ 

[ GoLang](https://github.com/matiasinsaurralde/go-wasm3) │ 

[ Zig](https://github.com/alichay/zig-wasm3) │

[ Perl](https://metacpan.org/pod/Wasm::Wasm3)  

[ Swift](https://github.com/shareup/wasm-interpreter-apple) │ 

[ .Net](https://github.com/tana/Wasm3DotNet) │ 

[ Nim](https://github.com/beef331/wasm3) │ 

[ Arduino, PlatformIO, Particle](https://github.com/wasm3/wasm3-arduino) │ [QuickJS](https://github.com/saghul/txiki.js)



## 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, Yocto, Buildroot (routers, modems, etc.)

-  Raspberry Pi, Orange Pi and other SBCs

-  MCUs: Arduino, ESP8266, ESP32, Particle, ... [see full list](./docs/Hardware.md)

-  Browsers. Yes, using WebAssembly itself!

-  `wasm3` can execute `wasm3` (self-hosting)



## Features



| Webassembly [Proposals][WasmProps]  | Extra |

| --- | --- |

| ☑ Import/Export of Mutable Globals           | ☑ Structured execution tracing     |

| ☑ Non-trapping float-to-int conversions      | ☑ Big-Endian systems support       |

| ☑ Sign-extension operators                   | ☑ Wasm and WASI self-hosting       |

| ☑ Multi-value                                | ☑ Gas metering                     |

| ☑ Bulk memory operations (partial support)   | ☑ Linear memory limit (< 64KiB)    |

| ☑ Custom page size                           |

| ⏳ Multiple memories                          |

| ⏳ Reference types                            |

| ☐ Tail call optimization                     |

| ☐ Fixed-width SIMD                           |

| ☐ Exception handling                         |

| ☐ Stack Switching                            |



## Motivation



**Why use a "slow interpreter" versus a "fast JIT"?**



In many situations, speed is not the main concern. Runtime executable size, memory usage, startup latency can be 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 embedded devices?**



Wasm3 started as a research project and remains so by any 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 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`, `plugin systems`, running `IoT rules`, `smart contracts`, etc.



## Used by



[](https://wasmcloud.dev)　

[](https://wowcube.com)　

[](https://github.com/siemens/dtasm/tree/main/runtime/dtasm3)　

[](https://scailable.net)　

[](https://blynk.io)　

[](https://www.iden3.io)　

[](https://github.com/apache/incubator-nuttx-apps/tree/master/interpreters/wasm3)　

[](https://github.com/Losant/eea-examples)　

[](https://github.com/kateinoigakukun/wasmic-ios)　

[](https://github.com/balena-io-playground/balena-wasm3)　

[](https://github.com/deislabs/krustlet-wasm3)　

[](https://shareup.app/blog/introducing-shareup)　

[](https://wasm4.org)



## Further Resources



[Demos](./docs/Demos.md)  

[Installation instructions](./docs/Installation.md)  

[Cookbook](./docs/Cookbook.md)  

[Troubleshooting](./docs/Troubleshooting.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)



[WasmProps]: https://github.com/WebAssembly/proposals/blob/main/README.md  "WebAssembly Finished Proposals"