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

for in each

Benchmark created by Tomás Hernández on September 30, 2012

Test runner

Ready to run.

Test Ops/sec

For

Testing in
Test	Ops/sec
For	`var arr = [1,2,3,"a","b","c",true,false,null,undefined], clone=[]; for(x=0; x<arr.length; x++){ clone.push(arr[x]); }`	ready
For in	`var arr = [1,2,3,"a","b","c",true,false,null,undefined], clone=[]; for(x in arr){ clone.push(arr[x]); }`	ready

var arr = [1,2,3,"a","b","c",true,false,null,undefined], clone=[];
for(x=0; x<arr.length; x++){
    clone.push(arr[x]);
}

ready

For in

var arr = [1,2,3,"a","b","c",true,false,null,undefined], clone=[];
for(x in arr){
    clone.push(arr[x]);
}

ready

Revisions

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

Revision 1: published by Tomás Hernández on September 30, 2012