Run results for: Spread operator vs array.map

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser: Chrome 103

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Spread operator	64588.4 Ops/sec
Spread operator v2	43686.5 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 operator
const updated = [...permutations]; return { ...state, data: { ...state.data, permutations: updated } };
Spread operator v2
const updated = permutations.map(p => p); return { ...state, data: { ...state.data, permutations: updated } };

Run results for: Spread operator vs array.map

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

Spread operator

Spread operator v2