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

base64encode

Benchmark created on July 10, 2023

Setup

const data = crypto.getRandomValues(new Uint8Array(1 << 8));

Test runner

Ready to run.

Test Ops/sec

btoa

Testing in
Test	Ops/sec
btoa	`console.log(btoa(Array.from(data, (x) => String.fromCodePoint(x)).join("")));`	ready
FileReader	`//return new Promise((resolve) => { const reader = new FileReader(); reader.onload = () => { console.log(reader.result.split(',', 2)[1]); }; reader.readAsDataURL(new Blob([data])); //})`	ready

console.log(btoa(Array.from(data, (x) => String.fromCodePoint(x)).join("")));

ready

FileReader

//return new Promise((resolve) => {
	const reader = new FileReader();
	reader.onload = () => {
		console.log(reader.result.split(',', 2)[1]);
	};
	reader.readAsDataURL(new Blob([data]));
//})

ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

Revision 1: published on July 10, 2023