diff --git a/README.md b/README.md
index ff298281..e44a6c39 100644
--- a/README.md
+++ b/README.md
@@ -202,7 +202,7 @@ Compact code output on one line.
 ### `controlFlowFlattening`
 Type: `boolean` Default: `false`
 
-##### :warning: This option greatly affects the performance up to 2x slower runtime speed. Use [`controlFlowFlatteningThreshold`](#controlflowflatteningthreshold) to set percentage of nodes that will affected by control flow flattening. 
+##### :warning: This option greatly affects the performance up to 1.5x slower runtime speed. Use [`controlFlowFlatteningThreshold`](#controlflowflatteningthreshold) to set percentage of nodes that will affected by control flow flattening. 
 
 Enables code control flow flattening. Control flow flattening is a structure transformation of the source code that hinders program comprehension.
 
diff --git a/test/dev/dev.ts b/test/dev/dev.ts
index 33459b06..a93eba66 100644
--- a/test/dev/dev.ts
+++ b/test/dev/dev.ts
@@ -1,5 +1,4 @@
 'use strict';
-import { NO_CUSTOM_NODES_PRESET } from '../../src/options/presets/NoCustomNodes';
 
 if (!(<any>global)._babelPolyfill) {
     require('babel-polyfill');
@@ -11,25 +10,96 @@ if (!(<any>global)._babelPolyfill) {
     let obfuscatedCode: string = JavaScriptObfuscator.obfuscate(
         `
             (function(){
+                var result = 1,
+                    term1 = 0,
+                    term2 = 1,
+                    i = 1;
+                while(i < 10)
+                {
+                    var test = 10;
+                    result = term1 + term2;
+                    console.log(result);
+                    term1 = term2;
+                    term2 = result;
+                    i++;
+                }
+        
+                console.log(test);
+                
+                var test = function (test) {
+                    console.log(test);
+                    
+                    if (true) {
+                        var test = 5
+                    }
+                    
+                    return test;
+                }
+                
+                console.log(test(1));
+                
+                function test2 (abc) {
+                    function test1 () {
+                      console.log('inside', abc.item);
+                    }
+                    
+                    console.log('тест', abc);
+                    
+                    var abc = {};
+                    
+                    return abc.item = 15, test1();
+                };
+                
+                var regexptest = /version\\/(\\d+)/i;
+                console.log(regexptest);
+                
+                test2(22);
+                console.log(105.4);
+                console.log(true, false);
+                
+                var sA = 'shorthand1';
+                var sB = 'shorthand2';
+                
+                console.log({sA, sB});
+                
                 function foo () {
                     return function () {
-                        var sum = 1 + 2;
-                        console.log(1);
-                        console.log(2);
-                        console.log(3);
-                        console.log(4);
-                        console.log(5);
-                        console.log(6);
+                        var sum1 = 10 + 20;
+                        var sum2 = 20 + 30;
+                        var sum3 = 30 + 50;
+                        var sub = sum3 - sum2;
+                        
+                        return sum1 + sub;
                     }
                 }
+                
+                try {
+                } catch (error) {
+                    console.log(error);
+                }
+                
+                console.log(foo()());
+                
+                function bar () {
+                    console.log(1);
+                    console.log(2);
+                    console.log(3);
+                    console.log(4);
+                    console.log(5);
+                    console.log(6);
+                    console.log(7);
+                    console.log(8);
+                }
+                
+                bar();
             })();
         `,
         {
-            ...NO_CUSTOM_NODES_PRESET,
             compact: false,
             controlFlowFlattening: true,
             controlFlowFlatteningThreshold: 1,
             disableConsoleOutput: false,
+            stringArray: true,
             unicodeEscapeSequence: false
         }
     ).getObfuscatedCode();