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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)

<canvas id="my-canvas">
</canvas>

Setup JS

var elm = document.getElementById('my-canvas');
    var c = elm.getContext('2d');

Teardown JS

Test cases

Test #1

Title *

Async

Code *

c.beginPath();
for (var i = 0; i < 1000; i++) {
  c.strokeStyle = "black";
  c.rect(3, 4, 4, 7);
}
c.stroke();

Test #2

Title *

Async

Code *

for (var i = 0; i < 1000; i++) {
  c.strokeStyle = "black";
  c.strokeRect(3, 4, 4, 7);
}

Test #3

Title *

Async

Code *

c.beginPath();
c.strokeStyle = "black";
for (var i = 0; i < 1000; i++) {
  c.rect(3, 4, 4, 7);
}
c.stroke();

Test #4

Title *

Async

Code *

c.strokeStyle = "black";
for (var i = 0; i < 1000; i++) {
  c.strokeRect(3, 4, 4, 7);
}