I have a WPF usercontrol which contains a number of textboxes and buttons. Currently these textboxes and buttons are all created and loaded dynamically into an ItemsControl through the code behind, whenever an instance of the control is created. The only hard-coded XAML is the declaration of the ItemsControl.
This can be a bit sluggish sometimes. Would it be any quicker if I got rid of the ItemsControl and hard-coded the textboxes and buttons into the usercontrol's XAML?
It's generally better to follow best practices for the platform you're working on; generating items 'by hand' in code-behind certainly isn't one of them in WPF. Look into using DataTemplates and leave the hard work for the framework. It's not hard-coding - you will still provide items (in code behind if you must, but preferably through bindings), and the ItemsControl will 'dress up' the items provided into its ItemsSource with the proper DataTemplates. This will usually work faster, even if only because virtualization is handled automatically (depending on the actual control you're using, but most ItemsControls do).