Run results for: Promo Map - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko

Browser: IE 11

Operating system: Windows 7

Device Platform: Other

Date tested: 8 years ago

Test name	Executions per second
testArrayIteration	9268117.0 Ops/sec
testArrayMap	6085397.0 Ops/sec
testUnderscoreMap	2445886.0 Ops/sec
testLodashMap	4222852.0 Ops/sec
testForLoop	22455820.0 Ops/sec

HTML Preparation code:

<html>
    <head>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
        <script>
        underscore = _;
        </script>


        <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.12.0/lodash.min.js"></script>

        <script>
        lodash = _;
        </script>
    </head>
    <body>
    </body>
</html>

Script Preparation code:


var PromosArray = [
    {
        type: "regular",
        display: "$123.00"
    },
    {
        type: "markdown",
        display: "$100.00"
    },
    {
        type: "promo",
        display: "$80.00"
    }
];

function testArrayIteration() {
    var items = [];
    var i;

    for (i = 0; i < PromosArray.length; i++) {
        items.push(PromosArray[i].type);
    }

    return items;
  
}

function testArrayMap() {
    return PromosArray.map(function (promo) {
        return promo.type;
    });
}

function testUnderscoreMap() {
    underscore.map(PromosArray, function (promo) {
        return promo.type;
    });
}

function testLodashMap() {
    lodash.map(PromosArray, function (promo) {
        return promo.type;
    });
}

function testForLoop() {
  	for (var i = 0; i < PromosArray.length; i++) {
     	return PromosArray[i].type; 
    }
}

Tests:

testArrayIteration
testArrayIteration();
testArrayMap
testArrayMap();
testUnderscoreMap
testUnderscoreMap();
testLodashMap
testLodashMap();
testForLoop
testForLoop();