Run results for: Iterate object

Run details:

User agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0

Browser: Firefox 48

Operating system: Windows 8.1

Device Platform: Other

Date tested: 8 years ago

Test name	Executions per second
prop not declared	38738664.0 Ops/sec
prop declared	31487398.0 Ops/sec
prop not declared without ref	30435558.0 Ops/sec
prop declared without ref	27244124.0 Ops/sec

HTML Preparation code:

<html>
  <head></head>
  <body>
    <script type="text/javascript">
    	var doc = new Document({width: 50, height: 50});
    </script>
  </body>
</html>

AخA
 
<html>
  <head></head>
  <body>
    <script type="text/javascript">
        var doc = new Document({width: 50, height: 50});
    </script>
  </body>
</html>

Script Preparation code:

    var Document = function(Config) {
      this.config = {
        worker: true,
        width: "auto",
        height: "auto"
      };
      this.init(Config);
    };

 
    var Document = function(Config) {      this.config = {        worker: true,        width: "auto",        height: "auto"      };      this.init(Config);    };

Tests:

prop not declared

    Document.prototype.init = function(Config) {
      var config = this.config;
      if(typeof Config == "object") {
        for(prop in Config) {
          if(config.hasOwnProperty(prop))
            this.config[prop] = Config[prop];
        }
      }
    };

 
    Document.prototype.init = function(Config) {      var config = this.config;      if(typeof Config == "object") {        for(prop in Config) {          if(config.hasOwnProperty(prop))            this.config[prop] = Config[prop];        }      }    };

prop declared

    Document.prototype.init = function(Config) {
      var config = this.config;
      if(typeof Config == "object") {
        for(var prop in Config) {
          if(config.hasOwnProperty(prop))
            this.config[prop] = Config[prop];
        }
      }
    };

 
    Document.prototype.init = function(Config) {      var config = this.config;      if(typeof Config == "object") {        for(var prop in Config) {          if(config.hasOwnProperty(prop))            this.config[prop] = Config[prop];        }      }    };

prop not declared without ref

    Document.prototype.init = function(Config) {
      if(typeof Config == "object") {
        for(prop in Config) {
          if(this.config.hasOwnProperty(prop))
            this.config[prop] = Config[prop];
        }
      }
    };

 
    Document.prototype.init = function(Config) {      if(typeof Config == "object") {        for(prop in Config) {          if(this.config.hasOwnProperty(prop))            this.config[prop] = Config[prop];        }      }    };

prop declared without ref

    Document.prototype.init = function(Config) {
      if(typeof Config == "object") {
        for(var prop in Config) {
          if(this.config.hasOwnProperty(prop))
            this.config[prop] = Config[prop];
        }
      }
    };

 
    Document.prototype.init = function(Config) {      if(typeof Config == "object") {        for(var prop in Config) {          if(this.config.hasOwnProperty(prop))            this.config[prop] = Config[prop];        }      }    };