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.