This is my comparison on the loading times when starting a new game or loading a game from save. This is recorded with the following specifications listed below:

CPU: Intel Core I3-2120 @ 3.30 GHz
RAM: 12 GB DDR3
GPU : NVIDIA NVS 315
OS: Windows 7 Enterprise

Basically, a low-end computer.

The times listed below are only recorded for when starting a new game. This is based on close-approximate recordings done on my computer with the hardware specifications listed above.

The following below is formatted as "Map Star Count - Time Taken to Start a Game upon Loading":

1k stars -- 30 seconds passed
2k stars -- 3 minutes and 30 seconds passed
3k stars -- 14 minutes and 15 seconds passed
6k stars -- 2 hours, 14 minutes, and 10 seconds


I will test loading existing games next time and see what results I get from it. You may respond with your loading times down below with a similar format seen in this thread, or however you may wish to detail your recordings.