NICK97 submitted a new resource:
Step 1: Locate GlobalSettings.cfg in Cities XXL/Data/Config/
Step 2: Open GlobalSettings.cfg
Step 3: Search for the phrase: <!-- Visibility Manager -- > and you will find this: <VisibilityEnabled>2</VisibilityEnabled> and change it to <VisibilityEnabled>0</VisibilityEnabled>.
Now when you start the game and load a city all the objects such as trees and city lights will be only drawn once so no redrawing of objects when you scroll the screen.
Step 4: Search for the phrase...