Run results for: javascript class vs function closure

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Test name	Executions per second
✓ closure	74,435 Ops/sec
class	57,346 Ops/sec

Tests:

class
class CowClass { constructor(lungCapacity) { this.lungCapacity = lungCapacity this.airInLungs = 0 } getAirInLungs() { return this.airInLungs } breathe () { this.airInLungs = this.lungCapacity } moo () { let output = 'm' let air = this.getAirInLungs() while (air --> 0) { // The 'goes to' operator output += 'o' } this.airInLungs = air return output } } const cow = new CowClass(3000) cow.breathe() cow.moo()
closure
function CowClosure(lungCapacity) { let airInLungs = 0 function breathe () { airInLungs = lungCapacity } function getAirInLungs () { return airInLungs } function moo () { let output = 'm' let air = getAirInLungs() while (air --> 0) { // The 'goes to' operator.df output += 'o' } airInLungs = air return output } return {breathe:breathe, moo:moo} } const cow = CowClosure(3000) cow.breathe() cow.moo()