Run results for: Constructor parameters versus object assignment

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:133.0) Gecko/20100101 Firefox/133.0

Browser: Firefox 133

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Constructor parameters	271.1 Ops/sec
Constructor object	82.4 Ops/sec
Factory function with object	212.5 Ops/sec
Factory function with definition and parameters	226.5 Ops/sec

HTML Preparation code:

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Script Preparation code:

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async function globalMeasureThatScriptPrepareFunction() {
    // This function is optional, feel free to remove it.
    // await someThing();
}

Tests:

Constructor parameters
class Component { constructor(x, y) { this.x = x; this.y = y; } } for(let i = 0; i < 100000; i++) { const component = new Component(i, i); }
Constructor object
class Component { constructor(params) { const keys = Object.keys(params); for(let i = 0, l = keys.length; i < l; i++) { this[keys[i]] = params[i]; } } } for(let i = 0; i < 100000; i++) { const component = new Component({ x: i, y: i}); }
Factory function with object
const createComponent = (params) => { const component = {}; const keys = Object.keys(params); for(let i = 0, l = keys.length; i < l; i++) { component[keys[i]] = params[i]; } return component; } for(let i = 0; i < 100000; i++) { const component = createComponent({ x: i, y: i}); }
Factory function with definition and parameters
const positionComponentDef = { x: Number, y: Number, }; const createComponent= (def, ...params) => { const component = {}; const keys = Object.keys(def); for(let i = 0, l = keys.length; i < l; i++) { component[keys[i]] = params[i]; } return component; } for(let i = 0; i < 100000; i++) { const component = createComponent(positionComponentDef, i, i); }

Run results for: Constructor parameters versus object assignment

Constructor parameters

Constructor object

Factory function with object

Factory function with definition and parameters