* lisp/progmodes/project.el (project--read-file-cpd-relative): Optimize.

diff --git a/lisp/progmodes/project.el b/lisp/progmodes/project.el
index 605636d93e36439551d5763d902f6da74812c23f..c263379847365035a8270e058a8b1b3d9cf4de65 100644 (file)
--- a/lisp/progmodes/project.el
+++ b/lisp/progmodes/project.el
@@ -1040,13 +1040,14 @@ by the user at will."
               (setq substrings (cons "./" substrings))))
          (new-collection (project--file-completion-table substrings))
          (abbr-cpd (abbreviate-file-name common-parent-directory))
+         (abbr-cpd-length (length abbr-cpd))
          (relname (cl-letf ((history-add-new-input nil)
                             ((symbol-value hist)
                              (mapcan
                               (lambda (s)
                                 (and (string-prefix-p abbr-cpd s)
-                                     (not (eq (length abbr-cpd) (length s)))
-                                     (list (substring s (length abbr-cpd)))))
+                                     (not (eq abbr-cpd-length (length s)))
+                                     (list (substring s abbr-cpd-length))))
                               (symbol-value hist))))
                     (project--completing-read-strict prompt
                                                      new-collection