Function sharedPrefixLen

iterator.go:489–498

-------------------------------------------- sharedPrefixLen returns the length of the prefix shared by a and b, which can might be 0 length.

(a, b []byte)

// sharedPrefixLen returns the length of the prefix shared by a and b,
// which can might be 0 length.
func sharedPrefixLen(a, b []byte) int {
	i := 0
	for i < len(a) && i < len(b) {
		if a[i] != b[i] {
			return i
		}
		i++
	}
	return i
}