Run results for: Object key access vs array find

Run details:

User agent: Mozilla/5.0 (X11; CrOS x86_64 14588.98.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.59 Safari/537.36

Browser: Chrome 101

Operating system: Chrome OS 14588.98.0

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Object access	6521.9 Ops/sec
Array find	2243.9 Ops/sec

Script Preparation code:

var items = Array.from(Array(1000), (_,x) => ({key: x, value: x*10}));

var objContainer = {};
var arrContainer = [];

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)
}

Tests:

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

Run results for: Object key access vs array find

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

Object access

Array find