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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_3_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.192 Safari/537.36

Browser: Chrome 88

Operating system: Mac OS X 11.3.0

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Get from Object	15329919.0 Ops/sec
Has key in Object	15319428.0 Ops/sec
Get from Map	15349749.0 Ops/sec
Has key in Map	15587208.0 Ops/sec
Get from Array	15493045.0 Ops/sec
Has key in Array OLD	14830276.0 Ops/sec
Has key in Array NEW	15415305.0 Ops/sec
Has key in Set	12154485.0 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