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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)

Setup JS

Teardown JS

Test cases

Test #1

Title *

Async

Code *

var test = {
  x: 5,
  y: [],
  faster: function() {
    var i = 0,
        res = 0;
    for (; i < 7000; i++) {
      this.y.push(i);
    }
    for (i = 0; i < this.y.length; i++) {
      res += this.x * this.y;
    }
    return res;
  }
};
test.faster();

Test #2

Title *

Async

Code *

var test = {
  x: 5,
  y: [],
  faster: function() {
    var i = 0,
        res = 0,
        me = this;
    for (; i < 7000; i++) {
      me.y.push(i);
    }
    for (i = 0; i < me.y.length; i++) {
      res += me.x * me.y;
    }
    return res;
  }
};
test.faster();