I was making my game, and after editing a certain sound file to get empty space out, and then putting it on my game, the game suddenly saved extremely slowly and loaded extremely slowly. I made an executable of it, looked at the file size, and saw that it grew by 12 megabytes. Ouch, I thought. So, wondering what I did that would change it, I checked the sound files size, and BOOM!!! I saw that it was 12 megabytes. After changing it, I figured that I would never try that again.