No Safe Efficient Ways to Do Three-way String Comparisons in Go

func Compare(a, b string) int {
	// NOTE(rsc): This function does NOT call the runtime cmpstring function,
	// because we do not want to provide any performance justification for
	// using strings.Compare. Basically no one should use strings.Compare.
	// As the comment above says, it is here only for symmetry with package bytes.
	// If performance is important, the compiler should be changed to recognize
	// the pattern so that all code doing three-way comparisons, not just code
	// using strings.Compare, can benefit.
	if a == b {
		return 0
	}
	if a < b {
		return -1
	}
	return +1
}

func Compare(a, b []byte) int {
	return bytealg.Compare(a, b)
}