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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

var A = [1, 2, 3, 4, 5],
    B = ['a', 'b', 'c', 'd', 'e'],
    C = [[1, 2], [3, 4], [5, 6], [7, 8], [9, 10]];

Teardown JS

Test cases

Test #1

Title *

Async

Code *A instanceof Array ? true : false;

Test #2

Title *

Async

Code *B instanceof Array ? true : false;

Test #3

Title *

Async

Code *C instanceof Array ? true : false;

Test #4

Title *

Async

Code *Array.isArray(A) ? true : false;

Test #5

Title *

Async

Code *Array.isArray(B) ? true : false;

Test #6

Title *

Async

Code *Array.isArray(C) ? true : false;

Test #7

Title *

Async

Code *A.constructor === Array ? true : false;

Test #8

Title *

Async

Code *B.constructor === Array ? true : false;

Test #9

Title *

Async

Code *C.constructor === Array ? true : false;

Test #10

Title *

Async

Code *typeof A === 'object' && A.constructor === Array ? true : false;

Test #11

Title *

Async

Code *typeof B === 'object' && B.constructor === Array ? true : false;

Test #12

Title *

Async

Code *typeof C === 'object' && C.constructor === Array ? true : false;

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