Run results for: Spread operator vs. Array.map

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.0

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

Spread

22K/s

Map

7K/s

View exact numbers

Test name	Executions per second
✓ Spread	22,408 Ops/sec
Map	7,093 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

permutations = new Array(10000).map(() => ({ pagination: 'blah blah blah' }));
function updatePagination(action, prev) {
  return action;
}
action = 'something else';
state = { data: { permutations: [] } };
index = 5;

Tests:

Spread
return [...permutations];
Map
return permutations.map(p => p);

Run results for: Spread operator vs. Array.map

A comparison of the performance of the spread operator, [ ...array ], vs. Array.map(i => ...) and

Spread

Map