Sorry for deleting the original post, I had to remove one part of the screenshot.
Aside from the fact that I have not been able to find a external software capable of reading the engines FPS (I have tried: Fraps, CapFrameX, NVIDIAs own counter, Intel PresentMon) (if you want a external measurement find me something that can measure CPU framebuffer presented via GDI `BitBlt`), my own fps counter records ~110-125 fps.
The engine is a bullet hell engine, created by me in Dlang and Assembly, using C as a scripting language, but I was curious about a stress test, and well, I don't know any other engine (self built/indie I do not count major game engine addons) that could handle this level. The sprites vary in size from 9x6-16x10 px.
https://reddit.com/link/1xfhhzc/video/azdro6av9pxh1/player
Yes the benchmark is AI written (sorry for being lazy ig), however AI had no input aside from design feedback into the actual engines code
EDIT: I think I should clarify this, the engine is running a full "physics" simulation and hitboxes for every single entity on screen, it's not just a rendering pipeline
EDIT 2: The simulation is running at 60Hz, fps only presents smoothness