Run results for: Iterate object

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36

Browser: Chrome 68

Operating system: Windows 7

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
classic	2666834.0 Ops/sec
new1	2581473.0 Ops/sec
new2	2784125.0 Ops/sec

HTML Preparation code:

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

Script Preparation code:

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

Tests:

classic
Document.prototype.init = function(Config) { if(typeof Config == "object") { for(prop in Config) { if(this.config.hasOwnProperty(prop)) this.config[prop] = Config[prop]; } } };
new1
Document.prototype.init = function(Config) { var keys = Object.keys(Config); for(var i = 0; i < keys.length; i++) if(this.config.hasOwnProperty(keys[i])) this.config[keys[i]] = Config[keys[i]]; };
new2
Document.prototype.init = function(Config) { var keys = Object.keys(Config); for(var i = 0; i < keys.length; i++) if(this.config[keys[i]]) this.config[keys[i]] = Config[keys[i]]; };

Run results for: Iterate object

classic

new1

new2