Run results for: Object key access vs array find vs Set

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Set find

2.4M/s

Object access

1.6M/s

Array find

2K/s

View exact numbers

Test name	Executions per second
✓ Set find	2,381,297 Ops/sec
Object access	1,614,070 Ops/sec
Array find	1,569 Ops/sec

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))

Run results for: Object key access vs array find vs Set

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

Object access

Array find

Set find