Run results for: Value existance check in object, array, map, set

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36 Edg/91.0.864.41

Browser: Chrome 91

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
array	105074.8 Ops/sec
set	11048472.0 Ops/sec
object	11967276.0 Ops/sec
map	8884356.0 Ops/sec

Script Preparation code:

var randomStringsToGenerate = 10000;

var array = [];
var set = new Set();
var object = {};
var map = new Map();

for (let i = 0; i < randomStringsToGenerate; i++) {
  array.push(i);
  map.set(i, true);
  object[i] = true;
  set.add(i);
}

Tests:

array
return array.includes(5000)
set
return set.has(5000)
object
return object[5000]
map
return map.has(5000)