Run results for: Access Object, Map, Array, Set

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.99 Safari/537.36

Browser: Chrome 93

Operating system: Windows 7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Get from Object	7585320.0 Ops/sec
Has key in Object	7605498.0 Ops/sec
Get from Map	7587866.0 Ops/sec
Has key in Map	7611221.5 Ops/sec
Get from Array	7544719.0 Ops/sec
Has key in Array OLD	6511057.5 Ops/sec
Has key in Array NEW	7591226.5 Ops/sec
Has key in Set	6814680.5 Ops/sec

Script Preparation code:

var obj = {"one": true, "two": true, "three": true, "four": true, "five": true, "six": true, "seven": true, "eight": true, "nine": true, "ten": true};
var map = new Map([["one", true], ["two", true], ["three", true], ["four", true], ["five", true], ["six", true], ["seven", true], ["eight", true], ["nine", true], ["ten", true]]);

var arr = ["one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten"];
var set = new Set(["one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten"]);

Tests:

Get from Object
var value = obj['ten'];
Has key in Object
var has = 'ten' in obj;
Get from Map
var value = map.get('ten');
Has key in Map
var has = map.has('ten');
Get from Array
var value = arr[9];
Has key in Array OLD
var has = arr.indexOf('ten') > -1;
Has key in Array NEW
var has = arr.includes('ten');
Has key in Set
var has = set.has('ten');

Run results for: Access Object, Map, Array, Set

Get from Object

Has key in Object

Get from Map

Has key in Map

Get from Array

Has key in Array OLD

Has key in Array NEW

Has key in Set