Re: 22.1.50; insert-file-contents is slow under tramp

[Richard Stallman]

      If I just hold down `f'
    on this function eventually the slowdown occurs, but I cannot see
    where within it.  If I tried stepping through it, I'd probably be at
    it all night.

How about typing C-z during the slow part?  Then make a backtrace
and you'll see what it's doing.  If you try that a few times
you should see a pattern.