Run results for: Array.find vs. Map.get 300

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Safari/605.1.15

Browser: Safari 17

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Map.get, 100 elements

5.3M/s

Map.get, 3 elements

5.0M/s

Array.find, 3elements

4.1M/s

Array.find, 100 elements

3.3M/s

View exact numbers

Test name	Executions per second
✓ Map.get, 100 elements	5,283,624 Ops/sec
Map.get, 3 elements	4,992,838 Ops/sec
Array.find, 3elements	4,141,870 Ops/sec
Array.find, 100 elements	3,324,703 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(3);
array_large = getArray(100);

map_small = arrayToMap(array_small);
map_large = arrayToMap(array_large);

Tests:

Array.find, 3elements
const target = getRandomInt(2); array_small.find(el => el.id === target);
Map.get, 3 elements
const target = getRandomInt(2); map_small.get(target);
Array.find, 100 elements
const target = getRandomInt(99); array_large.find(el => el.id === target);
Map.get, 100 elements
const target = getRandomInt(999); map_large.get(target)

Run results for: Array.find vs. Map.get 300

Test the performance of Array.find vs. Map.get, with various array sizes, and with/without conversion from array to map

Array.find, 3elements

Map.get, 3 elements

Array.find, 100 elements

Map.get, 100 elements