Question

Our MVC website is very slow and I’d like to know how I can find the bottleneck. I use FireBug and I see that the request takes 15 seconds on the server. When I hit refresh, it takes about 3 seconds. I’d like to know how this is possible. What causes the 12 seconds?

Also, I think 3 seconds is also too long because the page I am requesting shows 25 records (from the database), a menu and some user info.

I’ve used the NHibernate profiler and I don’t see any query that takes a long execution time. It’s all a few ms.

Specs:

• The site is build with MVC 2
• We use Ninject
• We use NHibernate
• .NET 3.5
• We use a lot html.RenderPartial()
• SQL Server Express
• Log4Net

I hope that someone can help me to find the bottleneck(s). I don’t know what I can try.

Answer 1

Use the Visual Studio profiler :

http://www.slideshare.net/AbhijitJana1/tune-your-aspnet-application-using-visual-std
http://msdn.microsoft.com/en-us/magazine/cc337887.aspx
http://www.youtube.com/watch?v=Mcs9VqreEps

Update (Reflecting on comment that OP have VS that doesn’t have profiling feature) :

You can use EQATEC .NET profiler, it’s free for personal use :

http://www.eqatec.com/tools/profiler/