Today on my server I noticed that my player was taking 3 milliseconds to update according to Opis. So I shoved my inventory into a chest and I went down to 80-90 nanoseconds. So I started putting my items back in my inventory one at a time, and as soon as one of my packs went in(I have a bottomless pouch from Kami and a Big black backpack from the backpack mod), I immediately jerked up to taking 1.2 milliseconds. And when I put in my second pack, I went all the way back up to 3 milliseconds. Just a PSA for server owners who may user lesser hardware.