perf: Render only the current buffer

Author: jcs090218

auto-scroll-bar.el

@@ -195,10 +195,6 @@ Optional argument FRAME is used to select frame's minibuffer."
   (elenv-with-no-redisplay
     (auto-scroll-bar--show-hide window)))
 
-(defun auto-scroll-bar--pre-command (&rest _)
-  "Hook for pre command."
-  (set-window-parameter nil 'window-end nil))
-
 ;; XXX: Only for horizontal scroll.
 ;;
 ;; The hook `window-scroll-functions' doesn't get called on horizontal scroll.
@@ -211,7 +207,6 @@ Optional argument FRAME is used to select frame's minibuffer."
   (cond ((display-graphic-p)
          (add-hook 'window-size-change-functions #'auto-scroll-bar--size-change 90)
          (add-hook 'window-scroll-functions #'auto-scroll-bar--scroll 90)
-         (add-hook 'pre-command-hook #'auto-scroll-bar--pre-command 90)
          (add-hook 'post-command-hook #'auto-scroll-bar--post-command 90)
          (toggle-scroll-bar 1)
          (when auto-scroll-bar-horizontal (toggle-horizontal-scroll-bar 1))
@@ -222,7 +217,6 @@ Optional argument FRAME is used to select frame's minibuffer."
   "Disable function `auto-scroll-bar-mode'."
   (remove-hook 'window-size-change-functions #'auto-scroll-bar--size-change)
   (remove-hook 'window-scroll-functions #'auto-scroll-bar--scroll)
-  (remove-hook 'pre-command-hook #'auto-scroll-bar--pre-command)
   (remove-hook 'post-command-hook #'auto-scroll-bar--post-command)
   (toggle-scroll-bar -1)
   (toggle-horizontal-scroll-bar -1))