Asp net mvc 4 razor views precompilation taking an insane amount of time


ASP.NET is a popular programming used for building web applications. One common issue that developers face is the of Razor views taking an excessive of time. This can significantly impact the performance of the application and hinder the development process. In this article, we will explore some possible solutions to this .

Understanding the Issue

Before diving into the solutions, it is important to understand why precompilation of Razor views can take a long time. Razor views are compiled into C# code behind the scenes, and this compilation process can be resource-intensive, especially for projects with numerous views.

Solution 1: Enable View Precompilation

One way to address this issue is to enable view precompilation. By precompiling the views, the compilation process can be performed ahead of time, reducing the time required during runtime. To enable view precompilation, add the following code at the beginning of your ASP.NET code:


This configuration enables precompilation for Razor views with the .cshtml extension. Once enabled, the views will be compiled during the process, reducing the time required during runtime.

Solution 2: Use Precompiled Views

Another approach is to use precompiled views. Precompiled views are compiled into a separate assembly, which can be referenced by the main application. This eliminates the need for runtime compilation and can significantly improve performance.

To use precompiled views, you need to the following :

  1. Create a separate class project for the precompiled views.
  2. Add the necessary Razor views to the project.
  3. Build the project to generate the precompiled assembly.
  4. Reference the precompiled assembly in your main application.

By using precompiled views, the compilation process is performed during the build, reducing the time required during runtime.

Solution 3: Optimize View Code

In some cases, the performance issue may be caused by inefficient code in the Razor views. It is important to optimize the view code to minimize the time required for compilation.

Here are some tips for optimizing view code:

  • Avoid complex logic in views and move it to the controller or model.
  • Minimize the use of loops and conditionals in views.
  • Use caching to store frequently accessed data.
  • Reduce the number of dependencies and external calls in views.

By optimizing the view code, you can reduce the time required for compilation and improve the overall performance of the application.


Precompilation of Razor views in ASP.NET can take an excessive amount of time, impacting the performance of the application. By enabling view precompilation, using precompiled views, and optimizing the view code, developers can significantly improve the compilation time and enhance the overall performance of their ASP.NET applications.

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