Run results for: Array.includes vs String.includes vs Object Hashmap vs Set vs Array.indexOf Large

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

String.includes

8.4M/s

Object Hash-map

7.3M/s

ES6 Set

7.3M/s

Array.includes

6.5M/s

Array.indexOf

6.4M/s

View exact numbers

Test name	Executions per second
✓ String.includes	8,373,712 Ops/sec
Object Hash-map	7,301,624 Ops/sec
ES6 Set	7,269,268 Ops/sec
Array.includes	6,529,675 Ops/sec
Array.indexOf	6,381,634 Ops/sec

Script Preparation code:

var testArray = ['foo', 'a','b', 'c','d','e','f','g','h','i','j', 'k', 'l','m','n' ,'bar','o', 'p', 'q', 'r', 's','t','u', 'v','w','x','y', 'z'];
var testString = testArray.join(',');
var objectHash = testArray.reduce((acc, key) => {acc[key] = true; return acc;},{});
var testSet = new Set(testArray);

Tests: