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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

var collection = {
      key1: "foo",
      key2: "bar",
      key3: "baz",
      key4: "bah",
      key5: "hum",
      key6: "bug",
      key7: "abc",
      key8: "def",
      key9: "ghi"
    }

Teardown JS

Test cases

Test #1

Title *

Async

Code *

for (var key in collection) {
  localStorage.setItem(key, collection[key]);
}

Test #2

Title *

Async

Code *localStorage.setItem("all", JSON.stringify(collection));

Test #3

Title *

Async

Code *

for (var key in collection) {
  localStorage.getItem(key);
}

Test #4

Title *

Async

Code *JSON.parse(localStorage.getItem("all"));

Test #5

Title *

Async

Code *

for (var key in collection) {
  JSON.parse(localStorage.getItem("all"))[key];
}