How Go Finds a Substring: AVX2 Assembly in internal/bytealg
strings.Index dispatches to hand-written SSE/AVX2 assembly in internal/bytealg, uses IndexByte to skip to candidate positions, switches to Rabin-Karp for long needles, and picks …
Assembly
How Go's crypto Package Uses AES-NI and SHA-NI
crypto/aes and crypto/sha256 are now thin shims over crypto/internal/fips140, where CPUID feature bits pick between AES-NI, SHA-NI, AVX2 and generic Go implementations at build and …