I select and copy a large block of plain text from some file (e.g. gedit). I run :set paste and then enter insert mode, and paste the text in using the right mouse-button menu. vim them uses 100% cpu for the next several minutes before successfully pasting my text in. The text is usually only a few pages, and takes less than a second to paste into other applications (gedit window, web window, etc). What is vim doing with all those clock cycles and how can I make this more efficient?