const runtime.maxKeySize

3 uses

	runtime (current package)
		map.go#L78: 	maxKeySize  = 128
		map.go#L1296: 	if t.key.size > maxKeySize && (!t.indirectkey() || t.keysize != uint8(goarch.PtrSize)) ||
		map.go#L1297: 		t.key.size <= maxKeySize && (t.indirectkey() || t.keysize != uint8(t.key.size)) {