How fast can you read, if i may ask?
Well, I do not consider it reading.
First I still read at fast emotional slog when it a small matter, much as most people are in the habit of doing. I sometimes just default to some basic speed reading when it passes one full page, so that is no more the 1-2 thousand words a minute. I only do this when I must look at reports I usually do not care to look at all that much.
Otherwise most often I just look at the material by flipping through it, like unto picture-reading. When I do this in front of people they look at me askance, but I ignore it and just speak or answer whatever questions for which I looked at the material to begin with. Since so far, I usually possess a better command of that material than they do after just picture reading the material, their skepticism passes.
But, for my computer science studies and anything else that runs into many pages, even unto several books on a like topic, I strictly 'picture-read' them all. For this I count pages and usually keep it to less than 3000 pages in any single day. I have done more, but like about 2000 pages. I do experience a fatigue best expressed as a kind of mental stress past a certain point. When I walk off to go do something with my hands the book flows through my mind like a movie.
So, two hours or so for a 1 million words. You get used to it.
But, I see limitations to this just yet. One, I need stay on a single topic. It is easier with well written material. I have other skill-sets used and honed over decades and enough personal experience years past that I have no issue with belief.
I see this as dealing with ideas and energy. When picture-reading an old book I love and have well studied through the years, I get very wired, high nervous energy perhaps; hard to stay put picture-reading the whole book. All skills unfold by use and persistent application.
You have to bring more to the table than first meets the eye, if not you must 'develop or unfold' to meet the demands that confront you.
You want to do these things, 'persist to think and feel outside the box' as it were.
Kind regards,