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Swift 6 Wasmtime wrapper for SwiftPM, vendoring the official C API artifacts for most Apple platforms, Linux, and Windows.

5 starsC

WASM with JIT from a Swift SPM Package

by acoye·Jun 4, 2026·3 points·0 comments
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AI Analysis

●MidNiche Gem

SwiftPM wrapper around Wasmtime when SwiftWasm already exists for most use cases.

Strengths
  • •Swift 6 concurrency support with sendable engine configuration and actor-serialized store execution.
  • •Vendors official Wasmtime C API artifacts rather than requiring separate Rust toolchain setup.
  • •Comprehensive config knobs for fuel consumption, epoch interruption, and memory reservation.
Weaknesses
  • •JIT unavailable on mobile platforms where Swift is most commonly used anyway.
  • •Fundamentally a wrapper — Wasmtime itself already has mature Swift bindings elsewhere.
Target Audience

Swift developers needing WebAssembly runtime integration

Similar To

SwiftWasm · WasmKit · Wasmer Swift

Post Description

Hello HN,

For my own needs I needed a powerful WASM engine that provides JIT acceleration, and use it from the convenience of the Swift Package Manager.

So I ended up wrapping wasmtime (a Rust project) https://github.com/bytecodealliance/wasmtime/

The SPM package does support most platforms swift supports, including mobile where JIT is simply not available.

I'd be happy to hear from you if this is something you may be interested in using and what are your WASM use cases.

Thanks :+1:

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