This update adds concurrent processing for the backup. With this update, the backup will now use multiple cores to perform checking and compressing.
Use the advanced option
--concurrency-max-threads to toggle how many threads to use.
--concurrency-compressors can be used to adjust the number of hashers and compressors to use.
Beware that this update contains a lot of new code, and should only be used in test environments.
Other fixes in this build: