Introducing Ruvy

摘要

We’ve recently open sourced a project called Ruvy! Ruvy is a toolchain that takes Ruby code as input and creates a WebAssembly module that will execute that Ruby code. There are other options for creating Wasm modules from Ruby code. The most common one is ruby.wasm. Ruvy is built on top of ruby.wasm to provide some specific benefits. We created Ruvy to take advantage of performance improvements from pre-initializing the Ruby virtual machine and Ruby files included by the Ruby script as well as not requiring WASI arguments to be provided at runtime to simplify executing the Wasm module.

WASI is a standardized collection of imported Wasm functions that are intended to provide a standard interface for Wasm modules to implement many system calls that are present in typical language standard libraries. These include reading files, retrieving the current time, and reading environment variables. To provide context for readers not familiar with WASI arguments, WASI arguments are conceptually similar to command line arguments. Code compiled to WASI to read these arguments is the same code that would be written to read command line arguments for code compiled to target machine code. WASI arguments are distinct from function arguments and standard library code uses the WASI API to retrieve these arguments.