Fix over consing

window-purpose-core.el

@@ -107,13 +107,14 @@ regexp REGEXP."
   "Return the purpose of buffer BUFFER-OR-NAME, as determined by the
 regexps matched by its name.
 REGEXP-CONF is a hash table mapping name regexps to purposes."
-  (car (remove nil
-               (purpose--iter-hash
-                #'(lambda (regexp purpose)
-                    (purpose--buffer-purpose-name-regexp-1 buffer-or-name
-                                                           regexp
-                                                           purpose))
-                regexp-conf))))
+  (catch 'found
+    (maphash
+     #'(lambda (regexp purpose)
+         (when (purpose--buffer-purpose-name-regexp-1 buffer-or-name
+                                                      regexp
+                                                      purpose)
+           (throw 'found purpose)))
+     regexp-conf)))
 
 (defun purpose-buffer-purpose (buffer-or-name)
   "Get the purpose of buffer BUFFER-OR-NAME.
@@ -168,7 +169,7 @@ If no purpose was determined, return `default-purpose'."
 
 (defun purpose-buffers-with-purpose (purpose)
   "Return a list of all existing buffers with purpose PURPOSE."
-  (cl-remove-if-not #'(lambda (buffer)
+  (cl-delete-if-not #'(lambda (buffer)
                         (and (eql purpose (purpose-buffer-purpose buffer))
                              (not (minibufferp buffer))))
                     (buffer-list)))

window-purpose-utils.el

@@ -105,9 +105,7 @@ Example:
 for each entry in hash-table TABLE."
   (let (results)
     (maphash #'(lambda (key value)
-                 (setq results
-                       (append results
-                               (list (funcall function key value)))))
+                 (push (funcall function key value) results))
              table)
     results))
 

window-purpose-x.el

@@ -653,13 +653,21 @@ This function removes the buffer denoted by BUFFER-OR-NAME from all
 window-local buffer lists."
   (interactive "bBuffer to replace: ")
   (let* ((buffer (window-normalize-buffer buffer-or-name))
-         (purpose (purpose-buffer-purpose buffer))
-         (other-buffers (delete buffer (purpose-buffers-with-purpose purpose))))
+         ;; Delay calculating other-buffers until we need it
+         ;; This prevents unnecessary calculations on temporary
+         ;; buffers created by `with-temp-buffer' and other likewise
+         ;; non-displayed buffers
+         (other-buffers-calculated nil)
+         (other-buffers nil))
     (dolist (window (window-list-1 nil nil t))
       (if (eq (window-buffer window) buffer)
           (unless (window--delete window t t)
-            (let ((dedicated (purpose-window-purpose-dedicated-p window))
-                  (deletable (window-deletable-p window)))
+            (let* ((purpose (purpose-buffer-purpose buffer))
+                   (dedicated (purpose-window-purpose-dedicated-p window))
+                   (deletable (window-deletable-p window)))
+              (unless other-buffers-calculated
+                (setq other-buffers (delete buffer (purpose-buffers-with-purpose purpose))
+                      other-buffers-calculated t))
               (cond
                ((and dedicated other-buffers)
                 ;; dedicated, so replace with a buffer with the same purpose