Why is pasting a long one-liner very slow in Vim's insert mode?

Question

My Macbook was stuck yesterday, when I tried to paste 1200 lines of 80 characters to Vim. It was much faster to download the file, and not to paste the text.

I have

Answer 1

I favor set paste/nopaste like Masi suggested. In .vimrc, you can map some character to toggle paste (if often needed).

i.e.

set pastetoggle=§