Improving Backup Performance using SQL native methodology
Resource Governor can control the resource consumption of a backup.

By default, backing up using compression significantly increases CPU
usage, and the additional CPU consumed by the compression process can
adversely impact concurrent operations. Therefore, you might want to
create a low-priority compressed backup in a session whose CPU usage
is limited byResource Governor when CPU contention occurs. This topic
presents a scenario that classifies the sessions of a particular SQL
Server user by mapping them to a Resource Governor workload group that
limits CPU usage in such cases.

Use Resource Governor to Limit CPU Usage by Backup Compression (Transact-SQL)