Re: [PATCH] Speed up project-kill-buffers

[Dmitry Gutov]

Hi Stephen,

On 08.05.2021 15:03, Stephen Leake wrote:
> There are also projects that do not have a single root; an Emacs elisp
> project (which has load-path as roots), any project with dependent
> external libraries.

This is not really than different.

The VC backend has load-path in external roots (which can have 
counterparts in "dependency libraries" in other languages).

When we close such project, though, we usually don't want to kill any of 
the buffers belonging to external libraries (they might as well be part 
of some other project, e.g. one that the current depends on).

To support arbitrarily-shaped projects, though, we can introduce a 
method like 'project-contains-buffer?'. Which you would implement with 
'member'. The performance could be okay if your projects are small 
enough. It doesn't handle non-file-visiting buffers, though.