Some comments have mentioned memorising the piece which helps a great deal. One major difference I employ in my practice is this:

Instead of speeding up, I speed down. I play the section of notes as chords (which is the fastest you can go). Then I gradually slow down by rotation of my hand as I'm discovering the fingering dynamics. I find this to be considerably faster for me. I find it hard to speed up and never do so enough when starting slow.

I'm by no means an expert but this has helped me