Wasmer – The Universal WebAssembly Runtime

• wasmer

  36 16,725 9.9 Rust

  🚀 The leading WebAssembly Runtime supporting WASIX, WASI and Emscripten

  

  But I can assure you that Wasmer will implement this once browsers do (if they ever do, of course)

  [1]: https://github.com/wasmerio/wasmer/pull/2892

• awesome-wasm-runtimes

  2 1,189 0.0

  A list of webassemby runtimes

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• wasm-bindgen

  9 6,904 8.5 Rust

  Facilitating high-level interactions between Wasm modules and JavaScript

  

  > types other than int

  Floating point values are also supported.

  > for example strings and what not without the hacks of passing string lengths and addresses?

  That's not so much a "hack" per se, so much as it is fundamentally how string types are represented when broken down into their basic components. ARM, x64, etc. interact with strings in similar ways. Tools like wasm-bindgen[1] generate JS wrappers around the raw WASM calls, which wrap the address+length APIs in string accepting ones. For non-web use cases, you might have to roll your own boilerplate or boilerplate generators, but that's straightforward.

  > sharing of data. That is can I declare a struct of some sort in the main program, pass that to the webassembly script, operate on it, and return it? Last I looked at that the only thing I could come up with was passing it back and forth as a (pick your format here) json string.

  Multiple WASM instances can share a single memory instance without copying data. A non-wasm host will typically copy/serialize data into/out-of WASM memory for simplicitly/convenience/durability, but there are APIs[2][3] that let you directly manipulate WASM memory - and there's nothing stopping you from generating identical structures on both ends and directly using them without copying.

  [1]: https://github.com/rustwasm/wasm-bindgen

  [2]: https://docs.rs/wasmer/latest/wasmer/struct.Memory.html#meth...

  [3]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...

• wasm3

  3 6,454 4.7 C

  🚀 A fast WebAssembly interpreter and the most universal WASM runtime

  

• wasmtime

  49 13,564 9.9 Rust

  A fast and secure runtime for WebAssembly

  

• component-model

  16 695 0.0 Python

  Repository for design and specification of the Component Model

  

  No comment on the other points (I also prefer Wasmtime), but:

  I believe the linking proposal is dead for now and replaced by the component model: https://github.com/WebAssembly/component-model

  The Wasmtime implementation is in progress.

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