Time reduction for mass troop training

Ive heard about a time reduction for training a certain amount of troops at once, but never seen any figures. Can someone confirm this and give figures or deny this? I would be very grateful if so

This is a falsitude.
All you need do is go to your barracks and train the max amount of troops and you'll see.
There are two ways to reduce training times of troops.

1) upgrade your barracks
2) use gold coins

Okie dokie thank you