Low FPS and GPU usage in web games

[Joeeeeb5]

I tested slowroads.io and on Vivaldi, it uses 60% GPU and gives me a stable 165 fps. on mercury, it uses 40% and gives an unstable 110-150. Hardware acceleration is enabled

[zakius]

if you want to have any meaningful comparison you should use the same engine, Chromium based browsers tends to fare much better and improved compilation flags won't be enough to catch up