Slow procedures

Hi, I made some fairly complex scene. The scene itself renders smoothly in Chrome. But when i apply these puzzles (see screenshots), when some procedure is called, the whole scene pauses for a second or two. Is there some fundamental mistake I made? I tried it on different computer – same thing. It seems that only procedures slow down the performance. Other puzzles – like “when clicked” “if” etc. don’t slow down the scene. Any idea?