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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)

<script>
  var ar = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
</script>

Setup JS

Teardown JS

Test cases

Test #1

Title *

Async

Code *

for (var i = 0; i < ar.length; i++) {
 if (ar[i] === 5) {
  break;
 }
}

Test #2

Title *

Async

Code *

for (var i = 0, n = ar.length; i < n; i++) {
 if (ar[i] === 5) {
  break;
 }
}

Test #3

Title *

Async

Code *var a = ar.indexOf(5);

Test #4

Title *

Async

Code *

var i = 0,
    len = ar.length;
for( i = 0; i < len; i++ ) {
 if( ar[i] === 5 ) {
  break;
 }
}

Test #5

Title *

Async

Code *

var p =0, d = ar.length;
while (p<d) {
 if( ar[p] === 5 ) {
  break;
 }
 p++;
}