No he means when you test your game the loading time will get faster as FPSC saves your data about the map and uses it next time there for making it faster.
This will have no impact on the final build though i suggest a better PC if its too slow but FPSC is high graphics so you should understand it takes time to load.
Also you are totally taking over the FPSC X10 boards with your posts stop it please its not needed make one thread called something like "Help me please" and put all your questions there you will get many more responses and wont get people moaning.
EDIT: oh look thats something you also dont do click the edit button and edit posts dont write a new one straight after one you just done. It annoys people.
Welcome to the forum if you start doing the things above you will get allot further here.