When starting JRebel logs this (where one of the times saved is wrong):
JRebel 2.2.1 (200912211823)
(c) Copyright ZeroTurnaround OU, Estonia, Tartu.
Over the last 30 days JRebel
prevented the need for at least 378 redeploys/restarts.
JRebel saved you between 10,1 and 20,5 hours.
Over the last 146 days JRebel
prevented the need for at least 588 redeploys/restarts.
JRebel saved you between 10,1 and 20,5 hours.