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Run results for:
Object.assign vs defineProperties vs setPrototypeOf vs extends Function vs defineProperty
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<iframe src="https://measurethat.net/Embed?id=576023" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:134.0) Gecko/20100101 Firefox/134.0
Browser:
Firefox 134
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
defineProperties
5.4M/s
defineProperty
5.4M/s
extends Function
3.0M/s
Object.assign
2.4M/s
setPrototypeOf
1.2M/s
View exact numbers
Test name
Executions per second
✓
defineProperties
5,406,806 Ops/sec
defineProperty
5,396,500 Ops/sec
extends Function
2,970,618 Ops/sec
Object.assign
2,370,506 Ops/sec
setPrototypeOf
1,162,344 Ops/sec
Tests:
Object.assign
let f = ()=>0 Object.assign(f, { _foo: null, get foo() {return this._foo}, set foo(_foo) {this._foo = _foo}, })
defineProperties
let f = ()=>0 Object.defineProperties(f, { foo: { value: null, writable: true } })
setPrototypeOf
let f = ()=>0 Object.setPrototypeOf(f, { ...Function.prototype, _foo: null, get foo() {return this._foo}, set foo(_foo) {this._foo = _foo}, })
extends Function
class F extends Function { constructor() { super('return 0') } _foo = null get foo() {return this._foo} set foo(_foo) {this._foo = _foo} }
defineProperty
let f = ()=>0 f._foo = null Object.defineProperty(f, 'foo', { get() { return this._foo }, set(_foo) { this._foo = _foo } })