I have this concern that for some godforsaken reason, RetroArch with the Beetle PSX core runs at full speed, while Mednafen itself lags sometimes. The Beetle PSX core is maintained by the Mednafen team, and I don't have access to other emulators. My linux distribution doesn't have any other allowed emulators, and ePSXe is available, but its number version is greater than the max allowed. I don't have access to a Windows system either. Not that it matters, since my emulation experiences are better on Linux than on Windows

I have to say that, except for Vsync, video driver, and controller input, all the default options of RetroArch are being used, and the core options are also at its defaults, except for controller type.

I'm also concerned that PCSX ReARMed is not allowed, and I think it's a derivative project of ePSXe. Even the plugins made for ePSXe are compatible with PCSX-R

Will my run(s?) be accepted if I use RetroArch? Or I'm screwed, and limited to do runs for fun, and not for glory?

EDIT: Found a build of ePSXe 2.0.5 that I could compile and successfully run. But my question still remains open because 🤷🏻