perf: Speed up the wildcard function

Avoid unnecessary conversion to rune slice to
alleviate the pressure on the heap allocator.

Author: rabbitstack

pkg/util/wildcard/wildcard.go

@@ -27,27 +27,27 @@ func Match(pattern, name string) (matched bool) {
 	if pattern == "*" {
 		return true
 	}
-	// Does extended wildcard '*' and '?' match.
-	return deepMatchRune([]rune(name), []rune(pattern), false)
+	// Does extended wildcard '*' and '?' match?
+	return deepMatchRune(name, pattern, false)
 }
 
-func deepMatchRune(str, pattern []rune, simple bool) bool {
+func deepMatchRune(s, pattern string, simple bool) bool {
 	for len(pattern) > 0 {
 		switch pattern[0] {
 		default:
-			if len(str) == 0 || str[0] != pattern[0] {
+			if len(s) == 0 || s[0] != pattern[0] {
 				return false
 			}
 		case '?':
-			if len(str) == 0 && !simple {
+			if len(s) == 0 && !simple {
 				return false
 			}
 		case '*':
-			return deepMatchRune(str, pattern[1:], simple) ||
-				(len(str) > 0 && deepMatchRune(str[1:], pattern, simple))
+			return deepMatchRune(s, pattern[1:], simple) ||
+				(len(s) > 0 && deepMatchRune(s[1:], pattern, simple))
 		}
-		str = str[1:]
+		s = s[1:]
 		pattern = pattern[1:]
 	}
-	return len(str) == 0 && len(pattern) == 0
+	return len(s) == 0 && len(pattern) == 0
 }