Brennan’s Blog

One way to speed up an ASP.NET application is to trim ViewState as much as possible. You can do it by turning off ViewState for controls which do not need it or to move the ViewState to the server-side by adjusting the Page State Persister. To keep an eye on your ViewState you can use the following link as a bookmarklet which will tell you the length of the ViewState for the current page.

ViewState Length [save this bookmark]

var vs = document.getElementById('__VIEWSTATE');
if (vs != null)
{
  if (vs.value.length > 0)
  {
    alert('ViewState Length = ' + (vs.value.length/1024).toPrecision(4) + ' kb');
  }
  else
  {
    alert('ViewState Length = 0 kb');
  }
}
else
{
  alert('ViewState not found');
}