Slow startup of gnome apps on i3

Hi,

I kept looking and I found this on the Arch forum
https://bbs.archlinux.org/viewtopic.php?pid=1737005#p1737005
which seems to be the same problem.
but I’m not sure it applies here: in my .xinitrc there is (among other things)

get_session(){
    local dbus_args=(--sh-syntax --exit-with-session)
    case $1 in
        awesome) dbus_args+=(awesome) ;;
        bspwm) dbus_args+=(bspwm-session) ;;
        budgie) dbus_args+=(budgie-desktop) ;;
        cinnamon) dbus_args+=(cinnamon-session) ;;
        deepin) dbus_args+=(startdde) ;;
        enlightenment) dbus_args+=(enlightenment_start) ;;
        fluxbox) dbus_args+=(startfluxbox) ;;
        gnome) dbus_args+=(gnome-session) ;;
        i3|i3wm) dbus_args+=(i3 --shmlog-size 0) ;;
        jwm) dbus_args+=(jwm) ;;
        kde) dbus_args+=(startkde) ;;
        lxde) dbus_args+=(startlxde) ;;
        lxqt) dbus_args+=(lxqt-session) ;;
        mate) dbus_args+=(mate-session) ;;
        xfce) dbus_args+=(xfce4-session) ;;
        openbox) dbus_args+=(openbox-session) ;;
        *) dbus_args+=($DEFAULT_SESSION) ;;
    esac

    echo "dbus-launch ${dbus_args[*]}"
}

So, wouldn’t this already say that dbus-launch --exit-with-session i3 is present?

Plus, I’m not sure to understand the last message from the moderator.