Run results for: {} vs Map with set and CHECK value exists

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0

Browser: Firefox 136

Operating system: Windows

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
Creation: Object	91975.4 Ops/sec
Creation: Map	10409.6 Ops/sec

HTML Preparation code:

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

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

Script Preparation code:

const d1 = {};

for (let i = 0; i < 10000; i++) {
  	d1[i] = i;
}

const d2 = new Map();

for (let i = 0; i < 10000; i++) {
  	d2.set(i, i);
}

​x
 
const d1 = {};​for (let i = 0; i < 10000; i++) {    d1[i] = i;}​const d2 = new Map();​for (let i = 0; i < 10000; i++) {    d2.set(i, i);}​

Tests:

let v = 0;

for (let i1 = 0; i1 < 10000; i1++) {
  	if (d1[i1] !== undefined) {
      v++;
    }
}

 
let v = 0;​for (let i1 = 0; i1 < 10000; i1++) {    if (d1[i1] !== undefined) {      v++;    }}​

let v = 0;

for (let i2 = 0; i2 < 10000; i2++) {
  	if (d2.has(i2)) {
      v++;
    }
}

 
let v = 0;​for (let i2 = 0; i2 < 10000; i2++) {    if (d2.has(i2)) {      v++;    }}​