csv vs others

http://stackoverflow.com/questions/37010212/what-is-the-fastest-way-to-upload-a-big-csv-file-in-notebook-to-work-with-python

https://i.stack.imgur.com/f7liH.png

https://i.stack.imgur.com/yM1NB.png

https://i.stack.imgur.com/2DDyv.png