Benchmark: Object key access vs array find vs Set

Script Preparation code:

var items = Array.from(Array(1000), (_,x) => ({key: x, value: x*10}));

var objContainer = {};
var arrContainer = [];
var setContainer = new Set();

for (let i = 100; i >= 0; i--) {
  const index = Math.floor(Math.random() * 1000);
  const item = items[index];
  objContainer[item.key] = item;
  arrContainer.push(item)
  setContainer.add(item)
}

Tests:

Object access
items.forEach(item => objContainer[item.value])
Array find
items.forEach(item => arrContainer.find(containerItem => containerItem.value === item.value))
Set find
items.forEach(item => setContainer.has(item.value))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object access
Array find
Set find

Fastest: N/A

Slowest: N/A

ⓘ Get performance results from real users on your website with Request Metrics.

Website Performance Monitoring by Request Metrics

Latest run results:

Run details: (Test run date: 4 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.5993.2477 YaBrowser/23.11.0.2477 Yowser/2.5 Safari/537.36

Browser/OS: Yandex Browser 23 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Object access	25557.0 Ops/sec
Array find	4311.7 Ops/sec
Set find	25051.8 Ops/sec

Object key access vs array find vs Set (version: 0)

Test speed of object access by key vs array find to find object

Comparing performance of: Object access vs Array find vs Set find

Created: 7 months ago by: Guest

Jump to the latest result

Object access

Array find

Set find

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A