I wanted to mention that even though learning as fast as possible was certainly one aspect of Rav Nahman (of Breslov) thought as you can see in the Conversations of Rav Nahman section 76. And in fact we know that he told Rav Natan his disciple to learn that way. Still if you look in the Sefer HaMidot about learning, he brings up the issue of review as being very important.
So on one hand you could say, "Well, anyway he holds from review in the Conversations of Rav Nahman. But there the idea of review is to finish the whole book you are doing, and then go back and review it many times." That you can say just so as not to have him being contradictory. Still in a practical sense, I find it hard to review after I have finished a book. It lacks the freshness of the first time, and also I have forgotten everything by the time I start a second time. So the best idea is like what they do in the Mir in NY. The morning for intense depth learning--which means lots of review then and there. Not some distant time in the future. And the afternoon for fast learning. [In the Mir fast learning meant Gemara with Tosphot,]
So on one hand you could say, "Well, anyway he holds from review in the Conversations of Rav Nahman. But there the idea of review is to finish the whole book you are doing, and then go back and review it many times." That you can say just so as not to have him being contradictory. Still in a practical sense, I find it hard to review after I have finished a book. It lacks the freshness of the first time, and also I have forgotten everything by the time I start a second time. So the best idea is like what they do in the Mir in NY. The morning for intense depth learning--which means lots of review then and there. Not some distant time in the future. And the afternoon for fast learning. [In the Mir fast learning meant Gemara with Tosphot,]