Cutting an auto grow time down?

so I I'm looking for a few autos that I can grow in a short amount of time and put on weight. I would love to do a sog but if I can get a few big one that don't take forever that would work to. From what I've seen the large autos take forever. I was thinking about automazar since they are on sale now. But all the grow I've see are well over 3 months. I found one vid of someone who grew her and looks ready at day 70.......are you able to cut the time down but growing a certain way

Not only that but this growing made Buddha syrup into a monster...lol

i would say run them on bloom nutes the whole time but mine seem to be liking it and still taking their time.... so i dunno.... they finish faster the more watts you have on them usually .... forgive the shitty pics i used a potato to take them ..... brand new phone and the camera going out .... ive had them on sensi bloom since week 2 and never really flushed or even had much run off so ive been flushing them this one is the unhappiest out of the bunch