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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)

Setup JS

let values = Array.from({length: 10000}, (v, k) => k+1);
  let sum = 0;
  
  let add = function(x) {
      sum += x;
  }

Teardown JS



            sum = 0;
  values = [];

Test cases

Test #1

Title *

Async

Code *

for (let i = 0, l = values.length; i < l; i++) {
    sum += values[i];
}

Test #2

Title *

Async

Code *

for (let v of values) {
    sum += v;
}

Test #3

Title *

Async

Code *

values.forEach((v) => {
    sum += v;
})

Test #4

Title *

Async

Code *

for (let i = 0, l = values.length; i < l; i++) {
    add(values[i]);
}

Test #5

Title *

Async

Code *

for (let v of values) {
    add(v);
}

Test #6

Title *

Async

Code *

values.forEach((v) => {
    add(v);
})