Menu

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

// Populate the base array
      var arr = [];
      for (var i = 0; i < 1000; i++) {
        arr[i] = i;
      }
    
      function someFn(i) {
        return i * 3 * 8;
      }

Teardown JS

Test cases

Test #1

Title *

Async

Code *

arr.forEach(function (item){
  someFn(item);
})

Test #2

Title *

Async

Code *

for (var i = 0, len = arr.length; i < len; i++) {
  someFn(arr[i]);
}

Test #3

Title *

Async

Code *

for (var i = arr.length; i--) {
  someFn(arr[i]);
}

Test #4

Title *

Async

Code *

i = arr.length;
while(i--) {
   someFn(arr[i]);
}