Reducing expensive calculation of project root

[alastairdb]

Reducing expensive calculation of project root

[joaotavora]

No benchmarks, no issue :-) Could be a dup of #18

[alastairdb]

Following the profile report in #18:

> emacs -Q -l breadcrumb.el -f breadcrumb-mode /nix/store/wq7b9287kw2403mk52qllcml6jqz8rbk-emacs-gtk3-29.1/share/emacs/29.1/lisp/jka-compr.el.gz -f profiler-start

> ls -1 /nix/store | wc -l
67284

        7546  94% - command-execute
        7488  93%  - funcall-interactively
        7475  93%   - mwheel-scroll
        7419  92%    - scroll-up
        7419  92%     - eval
        7419  92%      - breadcrumb--header-line
        7419  92%       - let
        7419  92%        - cl-remove-if
        7419  92%         - mapcar
        7419  92%          - funcall
        7415  92%           - breadcrumb-project-crumbs
        7415  92%            - breadcrumb--summarize
        7411  92%             - if
        7411  92%              - breadcrumb--project-crumbs-1
        7411  92%               - catch
        7411  92%                - let*
        7391  92%                 - project-current
        7391  92%                  - project--find-in-directory
        7391  92%                   - project-try-vc
        7347  91%                    - locate-dominating-file
        7347  91%                       #<compiled 0x15c08eb5e7da5c67>
          44   0%                    + project--value-in-dir
          16   0%                 + while
           4   0%             + let
           4   0%           + breadcrumb-imenu-crumbs
           4   0%      mouse-wheel--get-scroll-window
           4   0%    - run-with-timer
           4   0%       run-at-time
          13   0%   - execute-extended-command
          13   0%    - command-execute
          13   0%       funcall-interactively
          58   0%  + byte-code
         410   5% - ...
         410   5%    Automatic GC
          31   0% + normal-top-level
          24   0% + timer-event-handler
           7   0% + jit-lock-function

I use straight in my init file and thus have a version of project from https://github.com/emacs-straight/project. I am using the latest version from that location and I don't see any obvious way to cache the call to project-current from within project itself

[joaotavora]

Just comment in #18. This is most likely a dup of that issue. You haven't said which Emacs versino or which project.el version you are using, you need be make sure of running the latest version. I don't know straight stuff sorry, and I'm not even much into Emacs dev itself lately. Just comment in #18, and maybe ping project.el maintainer if you can't find the solution there. Thanks.