Faster IO-operations

When working with large projects, it can be VERY slow when Blender always saves everything in scene when saving, especially if you do it often (ie. before each test-render).

If i tweak certain value to get the desired result, say 15 times, times, only the IO-operations wastes LOT of precious time.

It would be MUCH faster, if Blender would save only the changes in scene. There's really no point to save everything every time.