But I wanted to mention that I found a kind of balance to be the best approach, and this helped me also when I was majoring in Physics.
I think you can understand this in this way. The fast kind of learning("just say the words in order and go on with no review until you finish the book, and then go back to the beginning and start again") seems to work over a long period of time. It helps to get the overall outline of the subject. The detailed kind of learning with lots of review and in depth analysis seems to work best for having to past tests and get a degree. It does not take the place of the other.''
AT Polytechnic of NYU, I used to do my old forward and backwards method of learning in depth. That is, I would say the words or every page of my Physics texts forwards and backwards. But that is the in-depth class. The fast learning sessions was done also but not when I actually had to take tests. During that time, I had little time for the fast learning.