Well thanks, however, the module is able to tell me which parts of code take what time, but if you look at the code you may notice that besides from using oop, I also don't use threads, which may give some speed improvements.
Mainly I wonder how these games were made in the old days, where cumputers were slow, and threads were unknown.
Threads cannot make program run faster unless your computer has more than one CPU because on systems with single CPU no matter if you use threads or not your program cannot force CPU to run faster. Carefuly written event based program can actually beat threads based program because they avoid system's overhead for using threads.
Try to search google for 'Threads vs Events'. You may find some interesting reading on this topic.