AES

How Go Hashes Map Keys: AES-NI, wyhash and the Seed

Oct 21, 2026 16 min read Jay Hubbert

Map keys are hashed with AESENC on amd64 and arm64 and a wyhash-style fallback elsewhere, with a per-process key XORed with a per-map random seed that is regenerated when a map …

GoInternalsHashingMapsAES

Read more →