← Home · All topics

Go 1 27

2 GoKawiil briefs on this topic

Go 1.26 and 1.27 add experimental SIMD support, including a portable API

Go 1.26 introduced architecture-specific SIMD APIs for amd64, and Go 1.27 extends this with support for arm64 (NEON) and wasm. Go 1.27 also adds an experimental, platform-agnostic 'simd' package modeled loosely on the C++ Highway library, letting developers write vector code once that runs across AVX, AVX2, AVX512, NEON, and wasm SIMD instructions, with software emulation on unsupported platforms.

go.dev · 2026-09-25

Go 1.27 speeds small heap allocations via size-specialized functions

Go 1.27 introduces specialized memory allocation functions for objects of 80 bytes or smaller, tailored to the runtime's existing size-class system. These functions handle specific size classes and pointer/non-pointer distinctions, letting the compiler skip generic branching logic used in the shared mallocgc path.

go.dev · 2026-09-17