Use this question to get problem description:
It seems that after first load devexpress "resources"(themes, assemblies) are cached and the applications calls their instances much faster over time. Please show how to preload all needed resources during startup(while showing splash screen for example).
Thank you for the question. We have attached a sample to the following thread: How to use the DXSpashScreen window while loading the main window. Please try it, this sample should help you. I am looking forward to hearing from you.
Thank you, Marina