Run results for: map: Native vs Underscore vs Lodash

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Native	196131.3 Ops/sec
Underscore	398432.5 Ops/sec
Lodash	897237.9 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js'></script>

Script Preparation code:

var randomArray = Array.apply(null, Array(100)).map(function() {
	return Math.round(Math.random() * 1000);
});

// Underscore was loaded last, so this saves an instance of underscore and resets _ to it's previous value (lodash).
var _underscore = _.noConflict();
// This saves an instance of lodash and resets _ to it's previous value (undefined).
var _lodash = _.noConflict();

Tests:

Native
var array2 = randomArray.map(function (value, index) { return value * 2 })
Underscore
var array2 = _underscore.map(randomArray, function (value, index) { return value * 2 })
Lodash
var array2 = _lodash.map(randomArray, function (value, index) { return value * 2 })