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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 TEST_SIZE = 10_000;
const syms = Array.from({length: TEST_SIZE}, (_, ix) => Symbol())
const fnps = Array.from({length: TEST_SIZE}, (_, ix) => function (a) { return a; })

const samples = Array.from({length: Math.trunc(TEST_SIZE / 10)}, (_, ix) => Math.trunc(ix * 10))

Teardown JS

Test cases

Test #1

Title *

Async

Code *

let is = 0, ia = 0, result = 0;

for (; is < samples.length; is++) {
	ia = 0;
	for (; ia < fnps.length; ia++) {
		if (fnps[is] === fnps[ia]) {
			result++;
		}
	}
	
}

Test #2

Title *

Async

Code *

let is = 0, ia = 0, result = 0;

for (; is < samples.length; is++) {
	ia = 0;
	for (; ia < syms.length; ia++) {
		if (syms[is] === syms[ia]) {
			result++;
		}
	}
	
}