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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://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.js">
</script>

Setup JS

var arr = [];
    for (var i = 0; i < 10000; i++) {
      arr.push({
        Number: i
      });
    };
    var e = null;
    
    function Named(o, i) {
      e = o;
    };

Teardown JS

Test cases

Test #1

Title *

Async

Code *

$.each(arr, function(i, o) {
  e = o;
});

Test #2

Title *

Async

Code *

_.each(arr, function(o, i) {
  e = o;
});

Test #3

Title *

Async

Code *

for (var i = 0, len = arr.length; i <= len; i++) {
  e = arr[i];
};

Test #4

Title *

Async

Code *

for (var l = arr.length; l >= 0; l--) {
  e = arr[l];
};

Test #5

Title *

Async

Code *

if (arr.forEach) {
  arr.forEach(function(o, i) {
    e = o;
  });
};

Test #6

Title *

Async

Code *

if (arr.forEach) {
  arr.forEach(Named);
};