diff --git a/min/lib/JSMin.php b/min/lib/JSMin.php
index 75e8e10..011eca3 100644
--- a/min/lib/JSMin.php
+++ b/min/lib/JSMin.php
@@ -10,7 +10,7 @@
  * modifications to preserve some comments (see below). Also, rather than using
  * stdin/stdout, JSMin::minify() accepts a string as input and returns another
  * string as output.
- * 
+ *
  * Comments containing IE conditional compilation are preserved, as are multi-line
  * comments that begin with "/*!" (for documentation purposes). In the latter case
  * newlines are inserted around the comment to enhance readability.
@@ -60,7 +60,7 @@ class JSMin {
     const ACTION_KEEP_A     = 1;
     const ACTION_DELETE_A   = 2;
     const ACTION_DELETE_A_B = 3;
-    
+
     protected $a           = "\n";
     protected $b           = '';
     protected $input       = '';
@@ -70,36 +70,32 @@ class JSMin {
     protected $output      = '';
 
     /**
-     * Minify Javascript
+     * Minify Javascript.
      *
      * @param string $js Javascript to be minified
      * @return string
      */
     public static function minify($js)
     {
-        // look out for syntax like "++ +" and "- ++"
-        $p = '\\+';
-        $m = '\\-';
-        if (preg_match("/([$p$m])(?:\\1 [$p$m]| (?:$p$p|$m$m))/", $js)) {
-            // likely pre-minified and would be broken by JSMin
-            return $js;
-        }
         $jsmin = new JSMin($js);
         return $jsmin->min();
     }
 
-    /*
-     * Don't create a JSMin instance, instead use the static function minify,
-     * which checks for mb_string function overloading and avoids errors
-     * trying to re-minify the output of Closure Compiler
-     *
-     * @private
+    /**
+     * @param string $input
      */
     public function __construct($input)
     {
         $this->input = $input;
+        // look out for syntax like "++ +" and "- ++"
+        $p = '\\+';
+        $m = '\\-';
+        if (preg_match("/([$p$m])(?:\\1 [$p$m]| (?:$p$p|$m$m))/", $input)) {
+            // likely pre-minified and would be broken by JSMin
+            $this->output = $input;
+        }
     }
-    
+
     /**
      * Perform minification, return result
      */
@@ -118,7 +114,7 @@ class JSMin {
         $this->inputLength = strlen($this->input);
 
         $this->action(self::ACTION_DELETE_A_B);
-        
+
         while ($this->a !== null) {
             // determine next command
             $command = self::ACTION_KEEP_A; // default
@@ -138,7 +134,7 @@ class JSMin {
                 }
             } elseif (! $this->isAlphaNum($this->a)) {
                 if ($this->b === ' '
-                    || ($this->b === "\n" 
+                    || ($this->b === "\n"
                         && (false === strpos('}])+-"\'', $this->a)))) {
                     $command = self::ACTION_DELETE_A_B;
                 }
@@ -152,7 +148,7 @@ class JSMin {
         }
         return $this->output;
     }
-    
+
     /**
      * ACTION_KEEP_A = Output A. Copy B to A. Get the next B.
      * ACTION_DELETE_A = Copy B to A. Get the next B.
@@ -214,7 +210,7 @@ class JSMin {
             // end case ACTION_DELETE_A_B
         }
     }
-    
+
     protected function isRegexpLiteral()
     {
         if (false !== strpos("\n{;(,=:[!&|?", $this->a)) { // we aren't dividing
@@ -239,7 +235,7 @@ class JSMin {
         }
         return false;
     }
-    
+
     /**
      * Get next char. Convert ctrl char to space.
      */
@@ -263,7 +259,7 @@ class JSMin {
         }
         return $c;
     }
-    
+
     /**
      * Get next char. If is ctrl character, translate to a space or newline.
      */
@@ -272,7 +268,7 @@ class JSMin {
         $this->lookAhead = $this->get();
         return $this->lookAhead;
     }
-    
+
     /**
      * Is $c a letter, digit, underscore, dollar sign, escape, or non-ASCII?
      */
@@ -280,7 +276,7 @@ class JSMin {
     {
         return (preg_match('/^[0-9a-zA-Z_\\$\\\\]$/', $c) || ord($c) > 126);
     }
-    
+
     protected function singleLineComment()
     {
         $comment = '';
@@ -296,7 +292,7 @@ class JSMin {
             }
         }
     }
-    
+
     protected function multipleLineComment()
     {
         $this->get();
@@ -324,7 +320,7 @@ class JSMin {
             $comment .= $get;
         }
     }
-    
+
     /**
      * Get the next character, skipping over comments.
      * Some comments may be preserved.