There are determinate tomato and indeterminate tomato varieties. Indeterminate ones are longer duration and grow like crazy.
I had planted Heem Sohna in PH and outside as well. Inside one grew to almost 20 feet, we had to take ladder for harvest. Outside achieved a decent 7 feet.
Yield wise, we got more from outside as vegetative growth was less. The PH one used all its energy to grow and grow.
So moral of the story- If you are planting indeterminate variety in PH, pruning is compulsary and you have to restrict the height and number of branches.
You will get plenty of links on tomato pruning and videos on youtube.
I got yield of almost 60 tons from 11/2 acre, which is very good, also my fruits were of higher quality and used to fetch me 1 rupee more.
Its a different story that I got an average of only Rs. 4 / kg during the 2 months of harvest. In the beginning, from 1 1/2 acres we used to send 2 tons daily to market for price of Rs. 1 which used to only cover my harvest and transport. Then they all died due to a blight attack in our area. All in all, no profit no loss.