Why is the same code slower in WPF than in Windows Forms?

Question

I have created many tests for platform 4.0 and older, and I don’t understand why the same code works slower when using WPF compared to Windows Forms:

This is code, it has nothing to do with user interface elements:

        Random rnd = new Random(845038);
        Int64 number = 0;
        for (int i = 0; i < 500000000; i++)
        {
            number += rnd.Next();
        }

In WPF, the code accepts 5968ms - 6024ms for Windows Forms and 6953ms in WPF.

Here is a post with a downloadable solution: http://blog.bettiolo.it/2010/04/benchmark-of-net-framework-40.html

Answer 1

When I downloaded the zip file and looked at your code, the problem became obvious: This is not the same code.

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Answer 5

Do you have any form showing on screen? I think the overhead for the form may be what you see.