DBus

dbus-broker is a drop-in replacement for the libdbus reference implementation, which aims "to provide high performance and reliability, while keeping compatibility to the D-Bus reference implementation".
Install 
dbus-broker:
pacman -S dbus-broker
Disable 
dbus.service and enable 
dbus-broker.service globally:
systemctl disable dbus
systemctl enable dbus-broker
Reboot for the changes to take effect.