It was always slow to display help from xsibackup by using --help parameter, but the greater the versions are, the longer the time to display help is.
With 10.0.1, each time i launch xsibackup --help, it takes between 60 and 70 seconds to display.
Looking quickly at the code, i can't understand why it's been so slow...
Yes, we know that. We'll change the way it works to make it faster. In the meanwhile use the online Man Page which contains all arguments and parameter information.