Generally our agent can process map 30-50 targets per day, so if you add 100 targets it'll take anywhere from 1.5 to about 3 days.
But you won't have to wait for the end for the results to come in - even in the first few seconds after upload our agent is beginning the mapping process. You should see your first results within the first minute (slightly longer if you used the 'Accounts' method of finding targets).
The agent will then methodically work its way through the list.
(In the future we'll give you the option to reprioritize the order of the mapping - eg let's say there's a group of 10 targets you desperately need to map right now, we'll let you move those to the front of the queue)