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jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.

jsperf.com URLs are mirrored at the same path, e.g:

https://jsperf.com/negative-modulo/2

Can be accessed at:

https://jsperf.app/negative-modulo/2

Test case details

Title *

Description
(Markdown syntax is allowed)

Preparation Code

Preparation HTML
(this will be inserted in the <body> of a valid HTML5 document in standards mode)
(useful when testing DOM operations or including libraries)

<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.4.4/underscore-min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/1.1.1/lodash.min.js"></script>
<script>
var lodash = _.noConflict();
</script>

Setup JS

var numbers = [];
  var object = {};
  for (var i = 0; i < 20; i++) {
    numbers[i] = i;
    object['key' + i] = i;
  }
  var objects = _.map(numbers, function(n) { return { 'num': n }; });
  var randomized = _.sortBy(numbers, function() { return Math.random(); });

Teardown JS

Test cases

Test #1

Title *

Async

Code *

var timesTwo = [];
_.each(numbers, function(num) { timesTwo.push(num * 2); });

Test #2

Title *

Async

Code *

var timesTwo = [];
lodash.each(numbers, function(num) { timesTwo.push(num * 2); });

Test #3

Title *

Async

Code *

var timesTwo = [];
_.each(object, function(num) { timesTwo.push(num * 2); });

Test #4

Title *

Async

Code *

var timesTwo = [];
lodash.each(object, function(num) { timesTwo.push(num * 2); });

Test #5

Title *

Async

Code *_.keys(object);

Test #6

Title *

Async

Code *lodash.keys(object);

Test #7

Title *

Async

Code *_.map(objects, function(obj) { return obj.num; });

Test #8

Title *

Async

Code *lodash.map(objects, function(obj) { return obj.num; });

Test #9

Title *

Async

Code *_.pluck(objects, 'num');

Test #10

Title *

Async

Code *lodash.pluck(objects, 'num');

Test #11

Title *

Async

Code *_.values(objects);

Test #12

Title *

Async

Code *lodash.values(objects);

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