In this uncut boring video I'm going to do a lag comparison between a locking hoppers with redstone torches and pistons pushing redstone blocks. I did this test under ideal conditions so there would not be any other impacts on the performance of either layout then themselves. I believe that until now nobody did this or at least made their results public. Breaking the uncertainty of what is better even with such simple things a significant leap forward to better technology.
My discord: / discord