The one or the other was certainly annoyed about it..
By reducing the swap file in my system (windows 7 / 64bit / 8GB RAM) to min. and max. 2024MB the phenomenon no longer occurred..
The reason is, that the loading process works exclusively via the RAMs and not partially via the swap file. Besides, the general "mini-stutterings" are also history.
Note:
Works only on systems with at least 8GB RAM