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WebAssembly interpreter in a Header (WAH)
61 starsWebAssembly
WebAssembly Interpreter in a Header
by lifthrasiir·May 3, 2026·2 points·0 comments
AI Analysis
●●●●GemWizardryNiche GemZero to One
Single-header WebAssembly 3.0 interpreter beats Wasmtime on embed complexity.
Strengths
- •Full WASM 3.0 support including GC and SIMD in pure C99.
- •Single-header distribution eliminates build system linking nightmares for embedded projects.
- •Fuel metering and stack limits enable safe untrusted code execution.
Weaknesses
- •16k lines in one file makes debugging and contributions difficult.
- •Performance likely trails optimized JIT runtimes like Wasmtime for heavy workloads.
Category
Target Audience
C/C++ developers, embedded systems engineers
Similar To
wasm3 · Wasmtime · wasmer
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