Run results for: Perfomance: Switch vs Polymorphism

Run details:

User agent: Mozilla/5.0 (iPad; CPU OS 14_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 14

Operating system: iOS 14.0

Device Platform: Tablet

Date tested: 4 years ago

Test name	Executions per second
Polymorphism	1422084.4 Ops/sec
Switch	1993867.0 Ops/sec

Script Preparation code:

var class1 = { GetImportantValue: () => 1 };
var class2 = { GetImportantValue: () => 2 };
var class3 = { GetImportantValue: () => 3 };
var class4 = { GetImportantValue: () => 4 };
var class5 = { GetImportantValue: () => 5 };

getImportantValueSwitch = (myClassEnum) => {
    switch (myClassEnum.type) {
        case 'MyClass1': return 1;
        case 'MyClass2': return 2;
        case 'MyClass3': return 3;
        case 'MyClass4': return 4;
        case 'MyClass5': return 5;
    }
}

getImportantValuePolymorphism = (myClass) => myClass.GetImportantValue();

Tests:

Polymorphism
getImportantValuePolymorphism(class1); getImportantValuePolymorphism(class2); getImportantValuePolymorphism(class3); getImportantValuePolymorphism(class4); getImportantValuePolymorphism(class5);
Switch
getImportantValueSwitch({type: 'MyClass1'}); getImportantValueSwitch({type: 'MyClass2'}); getImportantValueSwitch({type: 'MyClass3'}); getImportantValueSwitch({type: 'MyClass4'}); getImportantValueSwitch({type: 'MyClass5'});

Run results for: Perfomance: Switch vs Polymorphism

https://stackoverflow.com/questions/50401725/perfomance-switch-vs-polymorphism

Polymorphism

Switch