WebAssembly SIMD Instructions
The 128-bit v128 type and its ~240 instructions process four floats or sixteen bytes per operation, mapping to SSE/NEON on real CPUs for typical 2-4x gains in image, audio, and math kernels. Autovectorization is unreliable across the Wasm pipeline, so hot loops often need explicit SIMD intrinsics; relaxed-simd trades bit-exact determinism for closer-to-native codegen.
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The 128-bit v128 type and its ~240 instructions process four floats or sixteen bytes per operation, mapping to SSE/NEON on real CPUs for typical 2-4x gains in image, audio, and math kernels. Autovectorization is unreliable across the Wasm pipeline, so hot loops often need explicit SIMD intrinsics; relaxed-simd trades bit-exact determinism for closer-to-native codegen.
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