🚀 go-pugleaf

Epoch 4.0.1 of Tue Jul 21 1992 on phoenix (aix-v3) (Emacs 18.58)

File operations can be very time-consuming on large buffers, both
because of the I/O cost and because the whole buffer needs to be
swapped in.  This is psychologically acceptable when you explicitly
save a buffer, but is very annoying when it is an autosave (especially
an autosave on the large buffer while you're working on a small
buffer!).  It's especially annoying when the change to the large
buffer was accidental (yes, I know I should use C-x C-r
(find-file-read-only) instead of C-x C-f (find-file)....).

Incremental saves would be far cheaper, and Emacs already has the
information to do them, in the form of undo data.  So why not save the
undo data instead?  (except for buffers backed up by copying)  To
protect against file deletion, a #-link could be made to the base
file.  Of course, there is still the danger of the file being modified
in place by someone else.

	-s