Can blender use 100% CPU when baking to speed up baking? Can blender use 100% CPU when baking to speed up baking? When I was baking particles, CPU usage is around 50-60% usage and take many hours, is it possible to use 100% CPU to reduce baking time. Does the reason behind this is because using multiples cores haven't implement to particle baking yet or that is not the problem? 

I don't really know about programming sorry for my ignorance.
No, there's nothing you can do about that until multi-threading is implemented for particle baking.

...except use a single-core processor.