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im extremely curious about exceptional situation between asp.net mvc (4.7.2) and asp.net core mvc (2.2).

What im doing is:

Create empty asp.net mvc project , add new "TestController" cloned from default "HomeController" , duplicate views of home controller and name View directory as "Test".

doing exactly the same on asp.net core mvc project.

run asp.net mvc project and change url as /Test/Index (the view is exactly the same as Home/Index) and it took ~300ms to run on first time. if i refresh the page it took ~5-6 milliseconds to run.

im doing exactly the same on asp.net core mvc project and it took ~30 ms on first run and ~5-6 ms on every time i refresh.

i tested several cases and i think its all about "First creation of X type of controller".

im working on asp.net on 5-6 years but i've noticed this now. you can say it's no problem just 300 ms , but on the low resourced machine it took ~30 seconds.

what is this all about and how can i reduce this time to asp.net core time (~30ms) ?

EDIT: it turns out its not about the creation of controller. It's about the directories of views. I changed the Index action of TestController's view path with "~/Views/Home/Index" it opened fast (if i rendered any view from this folder before) , but if i "first time render a view from X directory (or sub directory) it works slowly as i mentioned."

i think its all about compiling views (or view directories). but im not figure it out yet.

consequently , if i move all my view files to same directory , this case never happens. but it will be very confusing and not feel right approach.

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I finally figured it out. It's all about compiling views at starting the application (not at runtime).

And its speeding up your website (especially if you have too many views)

Solution:

  1. Unload project
  2. Right click on the unloaded project and go > "Edit *.csproj"

  3. Paste these settings to bottom line of the file

    <Target Name="BeforeBuild"> <!-- Remove obj folder --> <RemoveDir Directories="$(BaseIntermediateOutputPath)" /> <!-- Remove bin folder --> <RemoveDir Directories="$(BaseOutputPath)" /> </Target>

  4. Reload the project

  5. Paste this code to global asax > Application_Start

    var siteId = "1"; // you can find your own from applicationhost.config
var appVirtualDir = $"/LM/W3SVC/{siteId}/ROOT";
var clientBuildManager = new ClientBuildManager(appVirtualDir, null, null,
                            new ClientBuildManagerParameter
                            {
                                PrecompilationFlags = PrecompilationFlags.Default,
                            });
clientBuildManager.PrecompileApplication();

  6. Run the project

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