lib: use cached str.length on charCodes

Signed-off-by: RafaelGSS <[email protected]>

Author: RafaelGSS

lib/querystring.js

@@ -273,10 +273,11 @@ function stringify(obj, sep, eq, options) {
  * @returns {number[]}
  */
 function charCodes(str) {
-  if (str.length === 0) return [];
-  if (str.length === 1) return [StringPrototypeCharCodeAt(str, 0)];
-  const ret = new Array(str.length);
-  for (let i = 0; i < str.length; ++i)
+  const len = str.length;
+  if (len === 0) return [];
+  if (len === 1) return [StringPrototypeCharCodeAt(str, 0)];
+  const ret = new Array(len);
+  for (let i = 0; i < len; ++i)
     ret[i] = StringPrototypeCharCodeAt(str, i);
   return ret;
 }