Benchmark: Access Object, Map, Array, Set with n items

Script Preparation code:

var length = 10000;
var key = '5000';
var obj = Array.from({length}).reduce((obj,_,index) => obj[index.toString()] = index, {});
var map = new Map(Array.from({length}).map((_,index) => [index.toString(), index]));

var arr = Array.from({length}).map((_,index) => index.toString());
var set = new Set(Array.from({length}).map((_,index) => index.toString()));

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Get from Object
Get from Map
Has key in Map
Has key in Array OLD
Has key in Array NEW
Has key in Set

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36 Edg/99.0.1150.39

Browser/OS: Chrome 99 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Get from Object	8136962.0 Ops/sec
Get from Map	9911699.0 Ops/sec
Has key in Map	9780282.0 Ops/sec
Has key in Array OLD	100228.7 Ops/sec
Has key in Array NEW	101177.5 Ops/sec
Has key in Set	9857264.0 Ops/sec

Access Object, Map, Array, Set with n items (version: 0)

Comparing performance of: Get from Object vs Get from Map vs Has key in Map vs Has key in Array OLD vs Has key in Array NEW vs Has key in Set

Created: 3 years ago by: Guest

Jump to the latest result

Get from Object

Get from Map

Has key in Map

Has key in Array OLD

Has key in Array NEW

Has key in Set

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A