MVC FindView slow on application start

Question

Is there anyway to run through the application and pre-populate the MVC ViewCache to eliminate the 2sec time loss that can sometimes occur during the warm-up of a web app?

At current whilst our application is starting, we sometimes are greeted with 2sec performance lag times.. once it's started there are mere-milliseconds.

In case it helps, I am definitely running in release mode, and only use the Razor engine:

    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();

        Bootstrapper.Initialise(); //IOC Setup
        RegisterGlobalFilters(GlobalFilters.Filters);
        RegisterRoutes(RouteTable.Routes);

        //Only use the RazorEngine. - http://blogs.msdn.com/b/marcinon/archive/2011/08/16/optimizing-mvc-view-lookup-performance.aspx
        ViewEngines.Engines.Clear();

        IViewEngine razorEngine = new RazorViewEngine() { FileExtensions = new string[] { "cshtml" } };

        ViewEngines.Engines.Add(razorEngine);
    }

Any suggestions welcome.

Ta

On which version of IIS are you hosting your application?

Darin Dimitrov
– Darin Dimitrov

2012-09-25 13:24:45 +00:00
Commented Sep 25, 2012 at 13:24 — Darin Dimitrov
– Darin Dimitrov, Commented Sep 25, 2012 at 13:24
It doesn't matter - read D. Ward's article mentioned below.

Zdeslav Vojkovic
– Zdeslav Vojkovic

2012-09-25 13:30:27 +00:00
Commented Sep 25, 2012 at 13:30 — Zdeslav Vojkovic
– Zdeslav Vojkovic, Commented Sep 25, 2012 at 13:30

Darin Dimitrov · Accepted Answer · 2012-09-25 13:28:03Z

2

You could use the new ASP.NET AutoStart feature in IIS 7.5. Also make sure that when you deploy your application it is running in Release mode (debug="false").

answered Sep 25, 2012 at 13:28

Darin Dimitrov

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3 Comments

Stuart.Sklinar Over a year ago

Thanks, I'm using this, but strangely things aren't as instant as you'd expect (that could be another issue).

Darin Dimitrov Over a year ago

You could bring that a step further by writing a custom IProcessHostPreloadClient provider as shown in the ScottGu's post inside which you could do heavy initialization work and warmup the application.

Stuart.Sklinar Over a year ago

I thought about that, but is there anyway to iterate all the views and load them all...

jrummell · Accepted Answer · 2012-09-25 13:27:21Z

1

Dave Ward discusses this and other issues related to debug="false" in your web.config in A harsh reminder about the importance of debug=”false”.

In debug mode, view resolution is optimized for ease of development. MVC iterates through the view resolution process each and every time your code renders a named view. That’s helpful since you obviously do want the environment to respond immediately to your changes when you’re working on a site.

In release mode, however, MVC’s view resolution is optimized for performance. When a view location is successfully resolved in release mode, MVC caches the result of that lookup and doesn’t need to perform another filesystem search when it encounters a reference to that named view again.

answered Sep 25, 2012 at 13:27

jrummell

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5 Comments

Stuart.Sklinar Over a year ago

Thanks - Don't worry, I've read over the @SamSaffron blog post about views being slow, and I've included my very own "Big Pink Box(TM)" method which checks for Http debugging etc.. so I know we're running in 'Release'/Retail mode

Stuart.Sklinar Over a year ago

Thanks for that - that's all good and well, but it's the FIRST view lookup that is the problem

jrummell Over a year ago

Based on your updated question, you've already done all that I know of to optimize view location. If there are other options, I'd like to know as well!

jrummell Over a year ago

Darin's answer regarding AutoStart looks promising.

Stuart.Sklinar Over a year ago

I'm thinking about writing a quick and dirty bit of code that will iterate the views folder and call render on the views (hopefully). I'll try share if I can!

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