diff --git a/dist/index.js b/dist/index.js
index 4b988052..2da09817 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -2792,7 +2792,7 @@ exports.FunctionObfuscator = FunctionObfuscator;
 "use strict";
 "use strict";
 
-var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
 
 var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
 
@@ -3205,7 +3205,7 @@ exports.BooleanLiteralReplacer = BooleanLiteralReplacer;
 "use strict";
 "use strict";
 
-var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
 
 function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
@@ -3734,7 +3734,7 @@ exports.AtobTemplate = AtobTemplate;
 "use strict";
 
 function ConsoleOutputDisableExpressionTemplate() {
-    return "\n        (function () {\n            var _ = '(\x04\x06\x03\x05[]' + '[\"filter\"][\"\x07tructor\"]' + '(\"return this\")()' + '.' + '\x03;\x06\x02\x05\x04};' + '_\x03.log\x01.in' + 'fo\x01.' + 'war' + 'n\x01.er' + 'r' + 'or\x01})();' + '\x01\x05_\x02;' + '_\x03\x02function' + '\x03\x07ole\x04\x02 ()' + '{\x05 = \x06var ' + '_\x07cons', \n                Y, \n                $;\n            \n            for (Y in $ = \"\x07\x06\x05\x04\x03\x02\x01\") {\n              var arr = _.split($[Y]);\n              _ = arr.join(arr.pop());\n            }\n            \n            [][\"filter\"][\"constructor\"](_)();\n        })()\n    ";
+    return "\n        (function () {\n            var _ = '(\u0004\u0006\u0003\u0005[]' + '[\"filter\"][\"\u0007tructor\"]' + '(\"return this\")()' + '.' + '\u0003;\u0006\u0002\u0005\u0004};' + '_\u0003.log\u0001.in' + 'fo\u0001.' + 'war' + 'n\u0001.er' + 'r' + 'or\u0001})();' + '\u0001\u0005_\u0002;' + '_\u0003\u0002function' + '\u0003\u0007ole\u0004\u0002 ()' + '{\u0005 = \u0006var ' + '_\u0007cons', \n                Y, \n                $;\n            \n            for (Y in $ = \"\u0007\u0006\u0005\u0004\u0003\u0002\u0001\") {\n              var arr = _.split($[Y]);\n              _ = arr.join(arr.pop());\n            }\n            \n            [][\"filter\"][\"constructor\"](_)();\n        })()\n    ";
 }
 exports.ConsoleOutputDisableExpressionTemplate = ConsoleOutputDisableExpressionTemplate;
 
diff --git a/test/performance-tests/JavaScriptObfuscatorPerformance.spec.ts b/test/performance-tests/JavaScriptObfuscatorPerformance.spec.ts
index a50ea1fd..9266c977 100644
--- a/test/performance-tests/JavaScriptObfuscatorPerformance.spec.ts
+++ b/test/performance-tests/JavaScriptObfuscatorPerformance.spec.ts
@@ -7,15 +7,25 @@ const assert: Chai.AssertStatic = require('chai').assert;
 describe('JavaScriptObfuscator performance', () => {
     const iterationsCount: number = 500;
 
-    describe('performance', () => {
-        it('should returns object with obfuscated code and empty source map', function (): void {
-            this.timeout(15000);
+    describe('performance: multiple calls', () => {
+        it('shows performance time with multiple obfuscator calls', function (): void {
+            this.timeout(10000);
 
             for (let i: number = 0; i < iterationsCount; i++) {
                 JavaScriptObfuscator.obfuscate(readFileAsString('./test/fixtures/sample.js'));
             }
 
-            assert.equal(1, 1);
+            assert.isOk(true);
+        });
+    });
+
+    describe('performance: large source code', () => {
+        it('shows performance time with large code size', function (): void {
+            this.timeout(5000);
+
+            JavaScriptObfuscator.obfuscate(readFileAsString('./test/fixtures/sample.js').repeat(iterationsCount));
+
+            assert.isOk(true);
         });
     });
 });