Skimming
Skimming is sometimes referred to as gist reading. Skimming may help in order to know what the text is about at its most basic level. You might typically do this with a magazine or newspaper and would help you mentally and quickly shortlist those articles which you might consider for a deeper read. You might typically skim to search for a name in a telephone directory.
You can reach a speed count of even 700 words per minute if you train yourself well in this particular method. Comprehension is of course very low and understanding of overall content very superficial.