Same for me. Lost around 5-10% of FPS, 100 → 90. Not that I can’t optimize it back to 100, but hey, I will have to optimize it anyways after all the game mechanics are in place. If UE will suck 10% of performance on each update there is no way I’ll fit to the budget.
So it’s not a question about “how to optimize” but rather “why does UE 5.4 perform significantly worse than 5.3 with the same vanilla Nanite+Lumen scene?”
I am kind of scared now.
ps. Thou I can confirm FPS/timings graph looks smoother in 5.4.