Run results for: Array.find vs. Map.get 20241610

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Linux

Device Platform: Desktop

Date tested: 29 days ago

Test name	Executions per second
Array.find, 10 000 elements	81.9 Ops/sec
Map.get, 10 000 elements	493.3 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(10000);
array_large = getArray(1000000);

map_small = arrayToMap(array_small);
map_large = arrayToMap(array_large);

Tests:

Array.find, 10 000 elements
const target = getRandomInt(9999); for (let i = 0; i < 1000; i++) { array_small.find(el => el.id === target); }
Map.get, 10 000 elements
map_small = arrayToMap(array_small); for (let i = 0; i < 1000; i++) { const target = getRandomInt(9999); map_small.get(target); }

Run results for: Array.find vs. Map.get 20241610

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

Array.find, 10 000 elements

Map.get, 10 000 elements