Run results for: Map key access vs array find

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Array find	1234.4 Ops/sec
Map access	13112.9 Ops/sec

Script Preparation code:

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

Tests:

Array find
items.forEach(item => arrContainer.find(containerItem => containerItem.value === item.value))
Map access
items.forEach(item => objContainer.get(item.value))

Run results for: Map key access vs array find

Array find

Map access