Are you using the ingame FPS meter? if its an external one it may be capturing YoloX FPS instead...

If YoloX is still having an impact, you can try safemode - right click pink X in taskbar. this forces YoloX to use CPU only (no GPU).

And next update will let you limit YoloX FPS and control VSYNC... to further reduce any impact on game perf.

Usually only the complex animating crosshairs should have any impact, but it shouldnt be more than 1%.

Even if I turn on safe mode, the frame drops still persist. After switching to the QHD system, frame drops occur noticeably depending on whether this program is run or not. When measured at the same location at the training center, if the frame rate is approximately 270 to 280 before turning on, there is a significant drop to around 250 to 260 after turning on the program.