Run results for: Array.find vs. Map.get (ADELINOLSN)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36 Edg/117.0.2045.43

Browser: Chrome 117

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Array.find, 100 elementos	1874591.5 Ops/sec
Array.find, 10 000 elementos	112309.4 Ops/sec
Array.find, 1 000 000 elementos	207.1 Ops/sec
Array to Map + Map.get, 100 elementos	211992.2 Ops/sec
Array to Map + Map.get, 10 000 elementos	1384.1 Ops/sec
Array to Map + Map.get, 1 000 000 elementos	5.2 Ops/sec
Array.find, TINY, 10 buscas	188570.9 Ops/sec
Map.get, TINY, 10 buscas	111222.4 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_tiny = getArray(100)
array_small = getArray(10000);
array_large = getArray(1000000);

Tests:

Array.find, 100 elementos
const target = getRandomInt(99); array_tiny.find(el => el.id === target);
Array.find, 10 000 elementos
const target = getRandomInt(9999); array_small.find(el => el.id === target);
Array.find, 1 000 000 elementos
const target = getRandomInt(999999); array_large.find(el => el.id === target);
Array to Map + Map.get, 100 elementos
const map = arrayToMap(array_tiny); const target = getRandomInt(99); map.get(target);
Array to Map + Map.get, 10 000 elementos
const map = arrayToMap(array_small); const target = getRandomInt(9999); map.get(target);
Array to Map + Map.get, 1 000 000 elementos
const map = arrayToMap(array_large); const target = getRandomInt(999999); map.get(target);
Array.find, TINY, 10 buscas
for (let i = 0; i < 10; i++) { const target = getRandomInt(99); array_tiny.find(el => el.id === target) }
Array to Map + Map.get, TINY, 10 buscas
const map = arrayToMap(array_tiny); for (let i = 0; i < 10; i++) { const target = getRandomInt(99); map.get(target); }
Array.find, SMALL, 100 buscas
for (let i = 0; i < 100; i++) { const target = getRandomInt(9999); array_small.find(el => el.id === target) }
Array to Map + Map.get, SMALL, 100 buscas
const map = arrayToMap(array_small); for (let i = 0; i < 100; i++) { const target = getRandomInt(9999); map.get(target); }
Array.find, SMALL, 1000 buscas
for (let i = 0; i < 1000; i++) { const target = getRandomInt(9999); array_small.find(el => el.id === target) }
Array to Map + Map.get, SMALL, 1000 buscas
const map = arrayToMap(array_small); for (let i = 0; i < 1000; i++) { const target = getRandomInt(9999); map.get(target); }

Run results for: Array.find vs. Map.get (ADELINOLSN)

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

Array.find, 100 elementos

Array.find, 10 000 elementos

Array.find, 1 000 000 elementos

Array to Map + Map.get, 100 elementos

Array to Map + Map.get, 10 000 elementos

Array to Map + Map.get, 1 000 000 elementos

Array.find, TINY, 10 buscas

Array to Map + Map.get, TINY, 10 buscas

Array.find, SMALL, 100 buscas

Array to Map + Map.get, SMALL, 100 buscas

Array.find, SMALL, 1000 buscas

Array to Map + Map.get, SMALL, 1000 buscas