Run results for: Array.find vs Map.get

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:131.0) Gecko/20100101 Firefox/131.0

Browser: Firefox 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Map.get, 10 000 elements

476.3M/s

Map.get, 1000 elements

468.0M/s

Map.get, 100 elements

420.3M/s

Array.find, 100 elements

1.8M/s

Array.find, 1000 elements

54K/s

Array.find, 10 000 elements

5K/s

View exact numbers

Test name	Executions per second
✓ Map.get, 10 000 elements	476,300,544 Ops/sec
Map.get, 1000 elements	467,951,840 Ops/sec
Map.get, 100 elements	420,348,960 Ops/sec
Array.find, 100 elements	1,779,824 Ops/sec
Array.find, 1000 elements	54,293 Ops/sec
Array.find, 10 000 elements	5,449 Ops/sec

Script Preparation code:

function getRandomElement(id) {
  return {
    id,
    a: Math.random(),
    b: Math.random(),
    c: Math.random(),
  }
}

function getArray(length) {
  const result = [];
  for (let i = 0; i < length; i++) {
    result.push(getRandomElement(i))
  }
  
  return result;
}

function arrayToMap(array) {
  return new Map(array.map(el => [el.id, el]));
}

function getRandomInt(max) {
  return Math.floor(Math.random() * max);
}

array_small = getArray(100);
array_medium = getArray(1000);
array_large = getArray(10000);

map_small = arrayToMap(array_small);
map_medium = arrayToMap(array_medium);
map_large = arrayToMap(array_large);

Tests:

Array.find, 100 elements
const target = getRandomInt(9999); array_small.find(el => el.id === target);
Map.get, 100 elements
const target = getRandomInt(9999); map_small.get(target);
Array.find, 1000 elements
const target = getRandomInt(999999); array_medium.find(el => el.id === target);
Map.get, 1000 elements
const target = getRandomInt(999999); map_medium.get(target)
Array.find, 10 000 elements
const target = getRandomInt(999999); array_large.find(el => el.id === target);
Map.get, 10 000 elements
const target = getRandomInt(999999); map_large.get(target)