klauspost/cpuid

Health v2 · maintenance only

Adoption not part of the score

1216 stars · 149 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A pure-Go library that detects CPU features and information (vendor, cores, caches, instruction set support) at startup for fast access. Supports x86/x64, ARM64, and RISC-V without cgo, and includes a CLI binary for printing CPU details.

Use cases

• detect if the CPU supports AVX2 before using SIMD code paths
• get CPU brand name, core count, and cache sizes in Go
• check for SSE4.2 or AES-NI support at runtime
• build CPU-dispatched optimized code in Go
• print CPU information from the command line
• avoid cgo when identifying CPU features

When to choose

• you need runtime CPU feature detection in Go without cgo
• you want to gate optimized code paths on instruction set availability
• you need detailed CPU info like cache sizes and frequency

When to avoid

• you need CPU identification on non-x86/ARM/RISC-V architectures
• you need real-time CPU monitoring or temperature/frequency telemetry
• you are not programming in Go

Facets

library · maturity stable

developer-tools sdk developer-tools hardware performance go windows cross-platform cpu-detection cpuid hardware-capabilities x86 arm64 riscv no-cgo linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="klauspost/cpuid")