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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36

Browser: Chrome 90

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
array	143841.0 Ops/sec
set	12059111.0 Ops/sec
object	12792256.0 Ops/sec
map	12246240.0 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);
}

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