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

Reverse string

Benchmark created on January 9, 2024

Test runner

Ready to run.

Test Ops/sec

For

Testing in
Test	Ops/sec
For	`const word = 'sql injection'; let reversed = ''; for (let i = 0; i < word.length - 1; ++i) { reversed = word[i] + reversed; }`	ready
String	`"sql injection".split().reverse().join("")`	ready
Array	`Array.from("sql injection").reverse().join("")`	ready

const word = 'sql injection';
let reversed = '';
for (let i = 0; i < word.length - 1; ++i) {
	reversed = word[i] + reversed;
}

ready

String

"sql injection".split().reverse().join("")

ready

Array

Array.from("sql injection").reverse().join("")

ready

Revisions

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

Revision 1: published on January 9, 2024