reading-localstorage

JavaScript performance comparison

Revision 3 of this test case created on 15th March 2012

See https://twitter.com/#!/johnallsopp/status/177964915632513024

<script>
localStorage.clear();

for(var i = 0; i < 100; i++)
  localStorage.setItem(i, 'Value ' + i);
</script>

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

Java applet disabled.

Test Ops/sec

Testing in unknown unknown
Test	Ops/sec
call to getItem	`for(var i = 0; i < localStorage.length; i++) var value = localStorage.getItem(i);`	pending…
index on localStorage	`for(var i = 0; i < localStorage.length; i++) var value = localStorage[i];`	pending…
index on getItem	`for(var i = 0; i < localStorage.length; i++) var value = localStorage.getItem[i];`	pending…

call to getItem

for(var i = 0; i < localStorage.length; i++)
  var value = localStorage.getItem(i);

pending…

index on localStorage

for(var i = 0; i < localStorage.length; i++)
  var value = localStorage[i];

pending…

index on getItem

for(var i = 0; i < localStorage.length; i++)
  var value = localStorage.getItem[i];

pending…

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