Help with Time difference in backtests

BrunoFerreira86  
Hello friends,
I am with the follow problem running EA on All Tick mode.

When I run it for 1 year backtest, its lates about 1 minute, however running the same for 2 years back test it lates about 10 minutes....
Besides that, the time to start a 2 years back test lates a lot to start.

Some examples
From 01/01/2016 to 01/01/2017
Start time = 2 seconds
Runtime = 1 minutes

From 01/01/2017 to 01/01/2018
Start time = 2 seconds
Runtime = 1 minutes

From 01/01/2016 to 01/01/2018
Start time = 1 minutes
Runtime = 10 minutes

Some tip to make it better...
Alain Verleyen  
Most probably a data issue. Hard to say.
Reason: