Major optimization refactor, across the board

+ enable lexical-scope everywhere (lexical-binding = t): ~5-10% faster
  startup; ~5-20% general boost
+ reduce consing, function calls & garbage collection by preferring
  cl-loop & dolist over lambda closures (for mapc[ar], add-hook, and
  various cl-lib filter/map/reduce functions) -- where possible
+ prefer functions with dedicated opcodes, like assq (see byte-defop's
  in bytecomp.el for more)
+ prefer pcase & cond (faster) over cl-case
+ general refactor for code readability
+ ensure naming & style conventions are adhered to
+ appease byte-compiler by marking unused variables with underscore
+ defer minor mode activation to after-init, emacs-startup or
  window-setup hooks; a customization opportunity for users + ensures
  custom functionality won't interfere with startup.

modules/lang/markdown/autoload.el

@@ -1,7 +1,7 @@
-;;; lang/markdown/autoload.el
+;;; lang/markdown/autoload.el -*- lexical-binding: t; -*-
 
 ;; Implement strike-through formatting
-(defvar +text--markdown-regex-del
+(defvar +markdown--regex-del
   "\\(^\\|[^\\]\\)\\(\\(~\\{2\\}\\)\\([^ \n	\\]\\|[^ \n	]\\(?:.\\|\n[^\n]\\)*?[^\\ ]\\)\\(\\3\\)\\)")
 
 ;;;###autoload
@@ -11,12 +11,13 @@
   (let ((delim "~~"))
     (if (markdown-use-region-p)
         ;; Active region
-        (let ((bounds (markdown-unwrap-things-in-region
-                       (region-beginning) (region-end)
-                       +text--markdown-regex-del 2 4)))
-          (markdown-wrap-or-insert delim delim nil (car bounds) (cdr bounds)))
+        (destructuring-bind (beg end)
+            (markdown-unwrap-things-in-region
+             (region-beginning) (region-end)
+             +markdown--regex-del 2 4)
+          (markdown-wrap-or-insert delim delim nil beg end))
       ;; Bold markup removal, bold word at point, or empty markup insertion
-      (if (thing-at-point-looking-at +text--markdown-regex-del)
+      (if (thing-at-point-looking-at +markdown--regex-del)
           (markdown-unwrap-thing-at-point nil 2 4)
         (markdown-wrap-or-insert delim delim 'word nil nil)))))