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: 3 months ago

Test name	Executions per second
Constructor parameters	167.4 Ops/sec
Constructor object	50.8 Ops/sec
Factory function with object	131.5 Ops/sec
Factory function with definition and parameters	149.1 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

AخA
 
<!--your preparation HTML code goes here-->

Script Preparation code:

/*your preparation JavaScript code goes here
To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/
async function globalMeasureThatScriptPrepareFunction() {
    // This function is optional, feel free to remove it.
    // await someThing();
}

 
/*your preparation JavaScript code goes hereTo execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/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);
}

​x
 
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});
}

 
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});
}

 
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);
}

 
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);}