References: runtime.mapaccess1

func runtime.mapaccess1_fast32

one use

	runtime (current package)
		map_fast32.go#L16: func mapaccess1_fast32(t *abi.MapType, m *maps.Map, key uint32) unsafe.Pointer

The pages are generated with Golds v0.8.4. (GOOS=linux GOARCH=amd64)