[2.0.20] [Performance] UPS drop 60 -> 40 Blueprint Preview

[Gummiente27]

Hi,

I have a performance problem during big (204x204) blueprint preview (FullHD, AMD 5600x, Nvidia 1660 Super).

UPS/FPS go from 60 to 44 in new game (and in my actual game save from 60 to ~35) just by previewing the blueprint.

You can find the blueprint in the inventory/hotbar of the save file (Test) or in the dedicated file.

Slowdown does not occurr in map view.
I noticed I other F4 options enabled when taking the screenshot (show-clock, show-blueprint-grid and show-fluid-box-fluid-info), but in later tests I did not notice any performance impact difference when reproducing this issue with those two options disabled as well.

My 2 cents on the problem

FPS doesn't improve whether the blueprint is completely on the screen or not, also zoom level doesn't change it.
All the extra time is spent in "Game render preparation".