That really is not unreasonable for CFD. How many cells do you have? If you don’t know you can run checkMesh on the case folder in the blueCFD terminal.
BTW, for the number of iterations each step is taking 70seconds is quite a big number. Is this running in single core perhaps? Does it work better if you run in parallel?
This is just the default 01_0_outdoor_airflow.gh file. So however many cells that one has.
In parallel it runs at about the same speed. It just seems weird to me that the solution in the video runs so much faster.