Run results for: class vs function composition

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0

Browser: Firefox 109

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
class	10278.7 Ops/sec
function	11733.4 Ops/sec

Tests:

class
class A { a() { return { a: 1 }; } a1() { return { a: 1 }; } a2() { return { a: 1 }; } a3() { return { a: 1 }; } a4() { return { a: 1 }; } a5() { return { a: 1 }; } } class B { constructor(a) { this.a = new A(); } a() { return this.a.a(); } a1() { return this.a.a1(); } a2() { return this.a.a2(); } } class C { constructor(a) { this.a = new A(); } a3() { return this.a.a3(); } a4() { return this.a.a4(); } a5() { return this.a.a5(); } } // var a = new A(); var b = new B(); var c = new C(); console.log('class', b.a.a === c.a.a);
function
ar = () => ({ a() { return { a: 1 }; } }) ar1 = () => ({ a1() { return { a: 1 }; } }) ar2 = () => ({ a2() { return { a: 1 }; } }) ar3 = () => ({ a3() { return { a: 1 }; } }) ar4 = () => ({ a4() { return { a: 1 }; } }) ar5 = () => ({ a5() { return { a: 1 }; } }) function B1() { return Object.assign({}, ar(), ar1(), ar2()); } function C1() { return Object.assign({}, ar(), ar4(), ar5()); } var b = B1(); var c = C1(); console.log('function', b.a === c.a);