Compiling slock from source needs further steps to make it work.

chown root ./slock
chmod u+s ./slock
 

I can't open some websites when I am connected to VPN. Default MTU size was 1500 when interface was up. In order to find the right MTU value, I tried following command:

ping -c 3 -M do -s 1300 stackoverflow.com

This is a great post for better font rendering in Linux.

# edit /etc/profile.d/freetype2.sh
export FREETYPE_PROPERTIES="truetype:interpreter-version=38"

cd /etc/fonts/conf.d
ln -s /usr/share/fontconfig/conf.default/10-hinting-slight.conf .
ln -s /usr/share/fontconfig/conf.avail/10-sub-pixel-rgb.conf .
ln -s /usr/share/fontconfig/conf.avail/11-lcdfilter-default.conf .
 

I compile gccemacs from source.libgccjit is required.

yay -S libgccjit
git clone git://git.savannah.gnu.org/emacs.git -b feature/native-comp

export LD="/usr/bin/ld.gold"
export CFLAGS="-g -flto -fuse-ld=gold"
export CXXFLAGS="-g -flto -fuse-ld=gold"

./autogen.sh

./configure \
--with-dbus \
--with-lcms2 \
--with-gif \
--with-jpeg \
--with-png \
--with-rsvg \
--with-xpm \
--with-tiff \
--with-xwidgets \
--with-x-toolkit=gtk3 \
--with-xft \
--without-xaw3d \
--with-cairo \
--with-xml2 \
--with-libotf \
--with-mailutils \
--with-json \
--with-gnutls \
--without-gconf \
--without-gsettings \
--with-sound=alsa \
--with-modules \
--with-native-compilation \
--enable-link-time-optimization \
--prefix=$HOME/.local/

make -j$(nproc)

(defun get-only-matched (query)
  "Goto the beginning of the current buffer; perform the search and store the matched strings
   Go back to the point of origin; create a new buffer; insert the matched strings into the new buffer
   Switch to the new buffer; go to the beginning of the new buffer."
  (interactive "sQuery:")
  (let (matched-list)
    (save-excursion
      (goto-char (point-min))
      (while (re-search-forward query nil t)
        (push
         (buffer-substring-no-properties (match-beginning 0) (match-end 0))
         matched-list)))
    (with-current-buffer (get-buffer-create "*MATCHED*")
      (mapc
       (lambda (matched)
         (insert matched "\n"))
       matched-list))
    (switch-to-buffer (get-buffer "*MATCHED*"))
    (goto-char (point-min))))