Menu

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

var a = Math.random() * 1000;
    var b = Math.random() * 1000000;
    var c = Math.random() * 1000000000;
    var d = Math.random() * 10;

Teardown JS

Test cases

Test #1

Title *

Async

Code *

a = Math.floor(a / d);
a *= Math.PI;
b = Math.floor(b / a);
b *= Math.PI;
c = Math.floor(c / b);
c *= Math.PI;

Test #2

Title *

Async

Code *

a = Math.round(a / d);
a *= Math.PI;
b = Math.round(b / a);
b *= Math.PI;
c = Math.round(c / b);
c *= Math.PI;

Test #3

Title *

Async

Code *

a = parseInt(a / d);
a *= Math.PI;
b = parseInt(b / a);
b *= Math.PI;
c = parseInt(c / b);
c *= Math.PI;

Test #4

Title *

Async

Code *

a = (a / d) | 0;
a *= Math.PI;
b = (b / a) | 0;
b *= Math.PI;
c = (c / b) | 0;
c *= Math.PI;

Test #5

Title *

Async

Code *

a = (a / d) >> 0;
a *= Math.PI;
b = (b / a) >> 0;
b *= Math.PI;
c = (c / b) >> 0;
c *= Math.PI;

Test #6

Title *

Async

Code *

a = ~~(a / d);
a *= Math.PI;
b = ~~(b / a);
b *= Math.PI;
c = ~~(c / b);
c *= Math.PI;

Test #7

Title *

Async

Code *

a = (a / d) >>> 0;
a *= Math.PI;
b = (b / a) >>> 0;
b *= Math.PI;
c = (c / b) >>> 0;
c *= Math.PI;