Run results for: Array.includes vs Set.has vas Map.has

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.1.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.1.2

Device Platform: Mobile

Date tested: 2 years ago

Map has

34.0M/s

Set has

33.4M/s

Array includes

12.3M/s

View exact numbers

Test name	Executions per second
✓ Map has	33,973,960 Ops/sec
Set has	33,425,182 Ops/sec
Array includes	12,302,273 Ops/sec

Script Preparation code:

var a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
var b = new Set([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
var c = new Map([[1, 1], [2, 2], [3, 3], [4, 4], [5, 5], [6, 6], [7, 7], [8, 8], [9, 9], [10, 10]]);

Tests:

Array includes
return a.includes(9);
Set has
return b.has(9);
Map has
return c.has(9);