Zero-Copy GPU Inference from WebAssembly on Apple Silicon — 83pts Technical Deep-Dive

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A technical blog post at 83pts on HN demonstrates how Apple Silicon's unified memory architecture enables zero-copy GPU inference from WebAssembly, eliminating serialization overhead entirely. Using Wasmtime's MemoryCreator trait, the Wasm module's linear memory shares physical bytes with the GPU — no copies, no intermediate buffers. A 128x128 matrix multiply benchmark shows the zero-copy path has essentially no overhead versus the copy path doubling memory footprint. This matters for edge AI: Wasm portability + Metal compute with no performance tax.