| I agree with practice you get faster. But how do you practice to get faster?
When I first started playing odd time signatures and practicing 4 way limb independence on the drums, my teacher recommended that I practice his way. He had me focus (see the rythmn in my head) and practice the exercise at less than half speed. I would practice for 10 minutes on one exercise. (The exercises were brutal and at times i wanted to walk out and quit). After the 10 minutes passed, I was not allowed to play for a full 5 minutes(I couldnt even hold the drum sticks). After the 5 minute break, I Increased practice to 15 minutes and took 5 minute break. Then Increased to 20 minutes and took 5 minutes off. At the end of the practice I nailed the exercise at full speed and had a great understanding of the time/rythmn. After a few months of lessons, I asked my teacher why he had me practice that way. He laughed and told me "because your lesson lasts one hour" I took him seriously. Actually, I didnt mind because I did get much better and excelled way past my friends who been playing drums before me. Then he said all kidding aside, He said you want to start slow and give your brain time to learn the part and talk/control your muscles. By increasing the time slowly and resting, your brain figures it out and your muscles just follow. Eventually my teacher recommended me to another teacher because he couldnt take me any further in my drumming. It was a great lesson. I still continue to practice drums that way 25 yrs later and now adopted that method for the bass.
I hope this helps, try it | 
