Run results for: Switch: String vs Object as expr

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36

Browser: Chrome 53

Operating system: Windows

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
String	110713.5 Ops/sec
Object	37987.7 Ops/sec

Script Preparation code:

function Metric1(name) {this.name = name;}

Metric1.TEST1 = new Metric1("TEST1");
Metric1.TEST2 = new Metric1("TEST2");
Metric1.TEST3 = new Metric1("TEST3");

var Metric2 = {
  TEST1: "TEST1",
  TEST2: "TEST2",
  TEST3: "TEST3"
};

Tests:

String
var i = 0; for (var j = 0; j < 100; ++j) { var metric = Metric2.TEST3; switch(metric) { case "TEST1": i += 1; break; case "TEST2": i += 2; break; case "TEST3": i += 3; break; } }
Object
var i = 0; for (var j = 0; j < 100; ++j) { var metric = Metric1.TEST3; switch(metric) { case Metric1.TEST1: i += 1; break; case Metric1.TEST2: i += 2; break; case Metric1.TEST3: i += 3; break; } }