Run results for: Set has vs object key 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Includes (best)

8.1M/s

Object[key]

7.9M/s

Set.has

6.7M/s

Includes (worst)

413K/s

View exact numbers

Test name	Executions per second
✓ Includes (best)	8,118,156 Ops/sec
Object[key]	7,852,282 Ops/sec
Set.has	6,674,695 Ops/sec
Includes (worst)	413,059 Ops/sec

Script Preparation code:

var obj = (new Array(1000)).fill(null).reduce((prev, newVal) => {prev[Math.random() + ''] = Math.random() + ''; return prev; }, { sausage: 'tst' });
var array_best_case = Object.keys(obj);
var array_worst_case = Object.keys(obj).reverse();
var set = new Set(array_worst_case);

Tests:

Object[key]
obj['sausage']
Set.has
set.has('saudage')
Includes (best)
array_best_case.includes('sausage')
Includes (worst)
array_worst_case.includes('sausage')

Run results for: Set has vs object key 2

performance comparison of ways to find if an array contains a value

Object[key]

Set.has

Includes (best)

Includes (worst)