per #64, more fixes to address significant performance concerns

minify.json.js

@@ -1,5 +1,5 @@
 /*! JSON.minify()
-	v0.2 (c) Kyle Simpson
+	v3.0.0 (c) Kyle Simpson
 	MIT License
 */
 
@@ -26,7 +26,7 @@
 			if (!in_multiline_comment && !in_singleline_comment) {
 				tmp2 = lc.substring(from);
 				if (!in_string) {
-					tmp2 = tmp2.replace(/(\n|\r|\s)*/g,"");
+					tmp2 = tmp2.replace(/(\n|\r|\s)+/g,"");
 				}
 				new_str[ns++] = tmp2;
 			}
@@ -37,14 +37,12 @@
 			// a comment? check for previous `\` escaping immediately
 			// leftward adjacent to this match
 			if (tmp[0] == "\"" && !in_multiline_comment && !in_singleline_comment) {
+				// perform look-behind escaping match, but
 				// limit left-context matching to only go back
 				// to the position of the last token match
 				//
 				// see: https://github.com/getify/JSON.minify/issues/64
-				lc.lastIndex = prevFrom;
-
-				// perform leftward adjacent escaping match
-				tmp2 = lc.match(/(\\)*$/);
+				tmp2 = lc.substring(prevFrom).match(/\\+$/);
 
 				// start of string with ", or unescaped " character found to end string?
 				if (!in_string || !tmp2 || (tmp2[0].length % 2) == 0) {