Re: [Emacs-diffs] master 55ec674: * lisp/multifile.el: New file, extracted from etags.el

[Juri Linkov]

> (benchmark 10 '(project-find-regexp "xyz1"))
> => 5.60s
> (benchmark 10 '(project-files-pipe-grep "xyz1"))
> => 6.31s or 6.10s, depending on the version
>
> Any suggestions?

On the very old computer from the year 2010, but the most interesting are 
relative times:

(benchmark 10 '(project-find-regexp "xyz1"))
=> 7s
(benchmark 10 '(project-files-pipe-grep "xyz1"))
=> 17s

(benchmark 10 '(project-files (project-current t)))
=> 11s

(benchmark 10 '(shell-command-to-string "find ... \\( -path ... \\) -prune -o  
-type f -print0"))
=> 11s

(benchmark 10 '(shell-command-to-string "git ls-files"))
=> 0.07s

IMHO, everything is clear: “find” with “-path” filters is slow,
whereas “git ls-files” is fast.