[Org] Hack: don’t read all properties of an entry when asking only for one

site-lisp/db-org.el

@@ -1004,6 +1004,26 @@ Current Task: %`org-clock-current-task; "
          (format "hy %s" tempfile))
       (delete-file tempfile))))
 
+
+;;; Hacks
+
+;; The default implementation is too slow, because it is parsing all properties
+;; of an entry by default.  Let’s simplify this to only parse what we are
+;; looking for.  This makes tag search *much* faster!
+
+(with-eval-after-load 'org
+  (defun org-cached-entry-get (pom property)
+    (if (or (eq t org-use-property-inheritance)
+            (and (stringp org-use-property-inheritance)
+                 (let ((case-fold-search t))
+                   (string-match-p org-use-property-inheritance property)))
+            (and (listp org-use-property-inheritance)
+                 (member-ignore-case property org-use-property-inheritance)))
+        ;; Caching is not possible, check it directly.
+        (org-entry-get pom property 'inherit)
+      ;; This is different in the original implementation
+      (org-entry-properties pom property))))
+
 
 ;;; End