Run results for: native reverse findIndex vs lodash _.findLastIndex

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2.1 Safari/605.1.15

Browser: Safari 17

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

array find

19.0M/s

_.findLastIndex

8.5M/s

View exact numbers

Test name	Executions per second
✓ array find	18,999,644 Ops/sec
_.findLastIndex	8,524,845 Ops/sec

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.core.js"></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var users = [
  { 'user': 'joey',  'age': 32 },
  { 'user': 'ross',    'age': 41 },
  { 'user': 'chandler', 'age': 39 }
]

Tests:

array find
// Native users.slice().reverse().findIndex(function (o) { return o.age === 41; })
_.findLastIndex
_.findLastIndex(users, function (o) { return o.age === 41; })

Run results for: native reverse findIndex vs lodash _.findLastIndex

Compare lodash findLastIndex with native reverse and findIndex.

array find

_.findLastIndex