Run results for: Object vs Map 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36

Browser: Chrome 142

Operating system: Windows

Device Platform: Desktop

Date tested: 8 months ago

map

15K/s

initialized object

13K/s

non-initialized object

13K/s

View exact numbers

Test name	Executions per second
✓ map	14,680 Ops/sec
initialized object	13,438 Ops/sec
non-initialized object	13,307 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); } } }