ASP.NET MVC partial views slow?

Question

I just happen to check the performance of an ASP.NET MVC application we are building. I was going to insert a partial view into a loop, and just out of curiosity I checked how l

Answer 1

I've just changed a MVC2 view from using a partial view in a loop to a single view, i.e. :

foreach(var a in items)
{
  <%: Html.Partial("SomePartialView",a) %>
}

Where SomePartialView contains the code to render a single row in a table, e.g. :

Model.NameModel.description

to :

foreach(var a in items)
{
  a.Namea.description
}

for a view rendering 900 rows the page render time went down from 5+ minutes page load to less than 30 secs, pretty conclusive proof that there is a significant overhead when calling partial views. I'm sure this is negligible when you have a single call, however in a loop it all adds up so I'd recommended avoiding partial views in a loop if possible.