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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

const length = 86400;
const array = Array.from({ length }).map((_, index) => index);
const uint16 = new Uint16Array(array);
const uint32 = new Uint32Array(array);
const float32 = new Float32Array(array);

Teardown JS

Test cases

Test #1

Title *

Async

Code *return array.reduce((acc, curr) => acc + curr, 0)

Test #2

Title *

Async

Code *

let total = 0;
let length = array.length;
for (let i = 0; i < length; i++) {
	total += uint32[i]
}
return total;

Test #3

Title *

Async

Code *

let total = 0;
let length = array.length;
for (let i = 0; i < length; i++) {
	total += uint16[i]
}
return total;

Test #4

Title *

Async

Code *

let total = 0;
let length = array.length;
for (let i = 0; i < length; i++) {
	total += float32[i]
}
return total;

Test #5

Title *

Async

Code *

let total = 0;
let length = array.length;
for (let i = 0; i < length; i++) {
	total += array[i]
}
return total;