Run results for: Object vs Map 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0

Browser: Firefox 145

Operating system: Windows

Device Platform: Desktop

Date tested: 5 months ago

Test name	Executions per second
non-initialized object	3772.0 Ops/sec
initialized object	3971.4 Ops/sec
map	3570.5 Ops/sec

HTML Preparation code:

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

Script Preparation code:

const o1 = {};

const m = new Map();

const keys = [];
for (let i = 0; i < 100; i++) {
  keys.push('key' + i);
}

const o2 = {};
for (key of keys) {
  o2[key] = 0;
}

Tests:

non-initialized object
for (let n = 0; n < 50; n++) { for (let i = 0; i < 100; i++) { const key = keys[i]; if (n === 0) { o1[key] = 0; } else { o1[key] += 1; } } }
initialized object
for (let n = 0; n < 50; n++) { for (let i = 0; i < 100; i++) { const key = keys[i]; if (n === 0) { o2[key] = 0; } else { o2[key] += 1; } } }
map
for (let n = 0; n < 50; n++) { for (let i = 0; i < 100; i++) { const key = keys[i]; if (n === 0) { m.set(key, 0); } else { m.set(key, m.get(key) + 1); } } }

Run results for: Object vs Map 2

non-initialized object

initialized object

map