Since XAML gets compiled, there should be no difference in execution of code like this.
Winforms (code like):

Form formPeter = new Form();
Textbox textbox = new Textbox();
Label l1 = new Label1();

Xaml does not get parsed at runtime, as I thought... :-)

But what about rendering/execution of big forms with lot of controls? Which technology is faster?

wpf winforms xaml
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