Benchmark: Array.find vs. Map.get (string)

Array.find vs. Map.get (string) (version: 0)

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

Comparing performance of: Array.find, 10 000 elements vs Map.get, 10 000 elements vs Array.find, 1 000 000 elements vs Map.get, 1 000 000 elements vs Array to Map + Map.get, 1 lookup vs Array to Map + Map.get, 10 lookups vs Array to Map + Map.get, 100 lookups vs Array.find, 10 lookups vs Array.find, 100 lookups

Created: 7 months ago by: Guest

Jump to the latest result

Script Preparation code:

function getRandomElement(id) {
  return {
    id: String(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 = String(getRandomInt(9999)); array_small.find(el => el.id === target);
Map.get, 10 000 elements
const target = String(getRandomInt(9999)}); map_small.get(target);
Array.find, 1 000 000 elements
const target = String(getRandomInt(999999)); array_large.find(el => el.id === target);
Map.get, 1 000 000 elements
const target = String(getRandomInt(999999)); map_large.get(target)
Array to Map + Map.get, 1 lookup
const map = arrayToMap(array_small); const target = String(getRandomInt(9999)); map.get(target);
Array to Map + Map.get, 10 lookups
const map = arrayToMap(array_small); for (let i = 0; i < 10; i++) { const target = String(getRandomInt(9999)); map.get(target); }
Array to Map + Map.get, 100 lookups
const map = arrayToMap(array_small); for (let i = 0; i < 100; i++) { const target = String(getRandomInt(9999)); map.get(target); }
Array.find, 10 lookups
for (let i = 0; i < 10; i++) { const target = String(getRandomInt(9999)); array_small.find(el => el.id === target) }
Array.find, 100 lookups
for (let i = 0; i < 100; i++) { const target = String(getRandomInt(9999)); array_small.find(el => el.id === target) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.find, 10 000 elements
Map.get, 10 000 elements
Array.find, 1 000 000 elements
Map.get, 1 000 000 elements
Array to Map + Map.get, 1 lookup
Array to Map + Map.get, 10 lookups
Array to Map + Map.get, 100 lookups
Array.find, 10 lookups
Array.find, 100 lookups

Array.find vs. Map.get (string) (version: 0)

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

Created: 7 months ago by: Guest

Jump to the latest result

Array.find, 10 000 elements

Map.get, 10 000 elements

Array.find, 1 000 000 elements

Map.get, 1 000 000 elements

Array to Map + Map.get, 1 lookup

Array to Map + Map.get, 10 lookups

Array to Map + Map.get, 100 lookups

Array.find, 10 lookups

Array.find, 100 lookups

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

No previous run results