Run results for: Lodash.js intersection vs native

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36 Edg/110.0.1587.41

Browser: Chrome 110

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Native	3478.7 Ops/sec
Lodash.js filter	14709.9 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

AخA
 
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

var max2 = 1000;

var arr1 = [];
for (var i = max2 / 2; i <= max2 + max2 / 2; i++) { arr1.push(i); }

var arr2 = [];
for (var i = 0; i <= max2; i++) { arr2.push(i); }

​x
 
var max2 = 1000;​var arr1 = [];for (var i = max2 / 2; i <= max2 + max2 / 2; i++) { arr1.push(i); }​var arr2 = [];for (var i = 0; i <= max2; i++) { arr2.push(i); }

Tests:

Native

const varMap = arr2.reduce((a, b) => ({...a, [b]: true}), {});

arr2.some(x => varMap[x]);

 
const varMap = arr2.reduce((a, b) => ({...a, [b]: true}), {});​arr2.some(x => varMap[x]);

Lodash.js filter
_.intersection(arr1, arr2).length > 0;
_.intersection(arr1, arr2).length > 0;

Run results for: Lodash.js intersection vs native

Native

Lodash.js filter