I noticed that on my machine (Alpine Linux 3.17), the game runs about 3-5% faster if FCEUX was built using GLVND instead of "legacy" OpenGL. Sounds small but it'll really do something on warpless runs.

Can other runners who use Linux try building it and see if the game runs any faster, please? I hope there isn't any problem and it's just my PC doing crazy things.

edit. I've only tried it on version 2.3.0 and 2.4.0 of the emulator. I'm tesing it with newer versions now.

if it runs faster, that's just not allowed, its an emulator and if its running at a faster speed its not properly emulating the game.

Turns out, on my machine, that speed changes only happens on GTK builds (pre-2.4.0). Newer versions replaced it with Qt5/6 and somehow fixed the issue (or maybe, at least, on my machine, as they run even slower than the legacy builds). However, most (if not all) distros provide packages of the emulator that weren't build with glvnd, so I think it shouldn't be much of a problem for the moderators.

But I'm quite concerned that someone might utilise it and there's no practical way to check if that person used an emulator that was build with it or not.

its so insanely easy to tell if a run is sped up, if you think smb1 mods are dumb enough to not notice that then like idk what to tell you