{
  "id": 9764301,
  "title": "Platform-Independent SIMD in Go",
  "url": "https://urgent.news/2026/09/25/platform-independent-simd-in-go",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-25T11:47:06.000Z",
  "source": {
    "name": "Hacker News",
    "slug": "hacker-news",
    "url": "https://go.dev/blog/simd-experiment"
  },
  "original_language": "en",
  "account": "Go 1.26 and 1.27 introduced experimental APIs for Single Instruction Multiple Data (SIMD) operations. SIMD is a native CPU feature that allows software to perform uniform operations on vectors of data quickly. These new APIs offer significant speedups for computationally-intensive tasks such as cryptography, data processing, and AI. Previously, accessing SIMD functionality from Go required writing Go assembly, which was only worth it for truly performance-critical tasks. Go 1.26 introduced SIMD APIs for amd64, and Go 1.27 added APIs for arm64 (NEON) and WebAssembly (wasm). However, platform variation poses a challenge for SIMD APIs, with differences in supported operations, vector representation, masking, and instructions. To address this, Go 1.27 introduces a fully portable, platform-agnostic SIMD interface, based on Highway for C++. This experimental, 'simd' package supports AVX, AVX2, AVX512 on amd64, NEON on arm64, and wasm's SIMD instructions. The simd package hides platform-specific variations by removing fixed-size vectors from the type system and supporting only the intersection of operations across platforms. It fills gaps with efficient emulation, ensuring written code always runs. To use this experimental package, set GOEXPERIMENT=simd, just like the experimental archsimd package. The simd vector types are capitalized, plural primitive types, such as simd.Uint8s or simd.Float32s. Vectors are loaded from and stored to slices. SIMD comparisons produce mask values specific to the vector element width, and these mask values can be used to select and filter vectors.",
  "summary": null,
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}