Run results for: findIndex + toSpliced vs map

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

map

3.6M/s

findIndex + toSpliced

2.7M/s

View exact numbers

Test name	Executions per second
✓ map	3,608,218 Ops/sec
findIndex + toSpliced	2,671,124 Ops/sec

Script Preparation code:

var items = [{name: 'name1', value: 1},{name: 'name2', value: 1},{name: 'name3', value: 1},{name: 'name4', value: 1}];
var search = 'name4';
var result = [];

Tests:

findIndex + toSpliced
var index = items.findIndex(({name}) => name === search); if (index >= 0) { result = items.toSpliced(index, 1, {...items[index], value: 2}); }
map
result = items.map(item => item.name === search ? {...item, value: 2} : item)