This mod frees memory resources once heist is loaded.
If you don't have problems related to memory, it's better not to install CTC.
The game loads too many resources at start. If you alt-tab from fullscreen or change resolution, it unloads them.
CTC triggers this behaviour automatically: no unused textures, more room for any other useful data. Though it may be interesting only for players on a 4GB system or people experimenting with heavy stuff.