Slow local network and cloud backup

Unfortunately, at present Duplicati doesn’t have a “be more aggressive if computer is not in use” feature, just the static --use-background-io-priority and --thread-priority advanced parameters.

--use-background-io-priority
This option instructions the operating system to set the current process to use the lowest IO priority level, which can make operations run slower but will interfere less with other operations running at the same time
Default value: “false”

--thread-priority
Selects another thread priority for the process. Use this to set Duplicati to be more or less CPU intensive.
Default value: “normal”


You may be running into the general 2.0.3.6 performance issue mentioned here:

I’m not sure how long until the fix will be made available, but if you can’t wait you might want to consider downgrading to 2.0.3.5 (or older) as described here: