Run results for: Array-Map + Set.has vs Array.Find

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser: Chrome 136

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Find

52.7M/s

Map + Set

6.4M/s

View exact numbers

Test name	Executions per second
✓ Find	52,652,020 Ops/sec
Map + Set	6,365,836 Ops/sec

Script Preparation code:

var a = [
  {id: 1, name: "1"},
  {id: 2, name: "1"},
  {id: 3, name: "1"},
  {id: 4, name: "1"},
  {id: 5, name: "1"},
  {id: 6, name: "1"},
  {id: 7, name: "1"},
  {id: 8, name: "1"},
  {id: 9, name: "1"},
  {id: 10, name: "1"},
];

Tests:

Find
return a.find(n => n === 9);
Map + Set
var b = new Set(a.map(item => item.id)); return b.has(9);