Noissue - Do not make a copy of _listeners while dispatching

ext/common.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 19 matching lines @@
     {
       this._listeners.add(listener);
     },
     removeListener(listener)
     {
       this._listeners.delete(listener);
     },
     _dispatch(...args)
     {
       let results = [];
-      let listeners = [...this._listeners];
 
-      for (let listener of listeners)
+      for (let listener of this._listeners)
         results.push(listener(...args));
 
       return results;
     }
   };
 
   // Workaround since HTMLCollection and NodeList didn't have iterator support
   // before Chrome 51.
   // https://bugs.chromium.org/p/chromium/issues/detail?id=401699
   let arrayIterator = Array.prototype[Symbol.iterator];
@@ skipping 16 matching lines @@
       return chrome.extension.getBackgroundPage();
     }
   };
 
 
   /* Utils */
 
   ext.getURL = chrome.extension.getURL;
   ext.i18n = chrome.i18n;
 }());