Speed up Time Machine backups
Time Machine backups are great, but very slow when a large amount of data/files needs to be transferred (such as the initial back-up). As designed by Apple the Time Machine background process is running in a very low CPU priority, giving all other running applications and services priority.
The command below prevents Time Machine’s backup process from assuming a low CPU priority, allowing backups to complete more quickly.
Disabling Priority Throttle
sudo sysctl debug.lowpri_throttle_enabled=0
The command is not persistent and will become inactive after a reboot. If you want revert to the default setting without a reboot type:
Enabling Priority Throttle (default)
sudo sysctl debug.lowpri_throttle_enabled=1