How we built it


SIMD.js exposes hardware SIMD instructions to Javascript applications in a platform-independent way. Add three SIMD vector types: float32x4, float64x2, and int32x4, and corresponding Typed Array views. SIMD.js can speed up applications that process lots of data that is naturally organized as 2, 3, or 4 element vectors. SIMD is also useful when compiling native code to Javascript for static compilation by the Javascript engine.


Working draft or equivalent

Status in Chromium

In development (launch bug)

Consensus & Standardization


Last updated on 2015-12-11