Run results for: Object lookup vs array lookup

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:147.0) Gecko/20100101 Firefox/147.0

Browser: Firefox 147

Operating system: Linux

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
Object access	229413.5 Ops/sec
Array find	1730.4 Ops/sec

Script Preparation code:

var items = Array.from(Array(1000), (_,x) => x + '');

var objContainer = {};
var arrContainer = [];

for (let i = 100; i >= 0; i--) {
  const index = Math.floor(Math.random() * 1000) + '';
  const item = items[index];
  objContainer[item] = item;
  arrContainer.push(item)
}

Tests:

Object access
items.forEach(item => objContainer[item])
Array find
items.forEach(item => arrContainer[arrContainer.indexOf(item)])

Run results for: Object lookup vs array lookup

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

Object access

Array find