Run results for: Iterate object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser: Chrome 69

Operating system: Mac OS X 10.13.6

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
prop not declared	8284571.0 Ops/sec
prop declared	3809782.0 Ops/sec

HTML Preparation code:

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

Script Preparation code:

    var Document = function(Config) {
      this.config = {
        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]; } } };
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]; } } };

Run results for: Iterate object

Iterate object

prop not declared

prop declared