more optimizations

utils/decode_resolvs.go

@@ -4,19 +4,15 @@ import "strings"
 
 func DecodeResolvs(input string) []string {
 	var result []string
-	pairs := strings.SplitSeq(input, "\n")
+	lines := strings.Split(input, "\n")
 
-	for pair := range pairs {
-		if pair == "" {
-			continue
-		}
-		kv := strings.SplitN(pair, " ", 2)
-		if len(kv) != 2 {
-			continue
-		}
-		value := strings.TrimSpace(kv[1])
-		if value != "" {
-			result = append(result, value)
+	for _, line := range lines {
+		trimmedLine := strings.TrimSpace(line)
+		if strings.HasPrefix(trimmedLine, "nameserver ") {
+			value := strings.TrimPrefix(trimmedLine, "nameserver ")
+			if value != "" {
+				result = append(result, value)
+			}
 		}
 	}
 	return result