Info

A benchmark to see if the size of strings stored in localStorage affects its read performance.

Preparation code

<script>
var small = "XXXXXXXXX-XXXXXXXXX-XXXXXXXXX-XXXXXXXXX-XXXXXXXXX-XXXXXXXXX-XXXXXXXXX-XXXXXXXXX-XXXXXXXXX-XXXXXXXXX-";
var medium = small + small + small + small + small;
var large = medium + medium;
var xlarge = large + large;

localStorage.setItem("a", small);
localStorage.setItem("b", medium);
localStorage.setItem("c", large);
localStorage.setItem("d", xlarge);
</script>
<script>
  Benchmark.prototype.teardown = function() {
    localStorage.clear();
  };
</script>

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

var value = localStorage.getItem("a");

var value = localStorage.getItem("b");

var value = localStorage.getItem("c");

var value = localStorage.getItem("d");

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by Nicholas C. Zakas on 23rd November 2011
• Revision 2: published on 23rd February 2012
• Revision 3: published on 23rd February 2012

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