A quick way to speed up your test game sessions is to change both these values in the SETUP.INI to 1:
skipobstaclecreation=0
skipterrainobstaclecreation=0
In the latest build, I have improved the AI obstacle generation so it saves the processed AI waypoints properly so can be loaded quicker on subsequent test game runs.
PC SPECS: Windows 8.1 Pro 64-bit, Intel Core i7-5930K (PASSMARK:13645), NVIDIA Geforce GTX 980 GPU (PASSMARK:9762) , 32GB RAM