Re: [Emacs-diffs] trunk r114117: * buffer.c (drop_overlay):

[Stefan Monnier]

> I'm also thinking about offloading GC with explicit marker freeing.
> For example, save-excursion creates up to 2 markers each time, and
> this is the well-known bottleneck because there may be thousands
> calls to save-excursion per just one basic editing command in cc-mode.

I'm not sure it would be worth the trouble.  Maybe a more promising
direction would be to avoid using markers in save-excursion.

In my experience, most save-excursions are used around code which makes
no buffer modifications, in which case plain integers would work just
as well.

So it might be beneficial for save-excursion to be optimistic and use
integers (with some appropriate hooking into maybe
prepare_to_modify_buffer to turn them into markers when needed).

But even there, I'm not sure it would really speed up cc-mode noticeably.


        Stefan