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/125.0.0.0 Safari/537.36

Browser: Chrome 125

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

ES6 Set

7.8M/s

Object Hash-map

6.1M/s

Array.indexOf

4.7M/s

Array.includes

4.1M/s

String.includes

2.0M/s

View exact numbers

Test name	Executions per second
✓ ES6 Set	7,763,102 Ops/sec
Object Hash-map	6,118,319 Ops/sec
Array.indexOf	4,691,976 Ops/sec
Array.includes	4,133,045 Ops/sec
String.includes	2,019,422 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: