I was just starting to do an exercise on a programming practice

website, and happened to paste some example data from the site

in to my Emacs buffer, without thinking anything of it.

It happened to be over 2000 characters on one line and Emacs froze

for a while.  Fortunately, it wasn't much more, or the freeze

would have been even longer.

Somehow, I think we have to find a solution that works when

any long line has to be displayed in a buffer, not just when

we open a file.

By the way, I tried adding the longlines.el workaround function to my

compilation-mode-hook and running a program that printed 10000

characters on a single line to the compilation-mode buffer, and

the longlines.el workaround did not help.  Emacs still froze.