I have a decently powerful system and I do not experience slowdowns and almost all games I tried run full speed. The ones that did not run full speed had emulation issues. Even if 2x-3x native resolution slowed down the most powerful systems out there, it may not always be that way. Plus it wouldn't hurt to have the option to experiment with, could it? 480 × 272 is quite a stretch across my 1080p 27'' monitor, the image is so blocky it's hard to make out some things in 3D environments. Even 2x/3x window sizes are pretty blocky, but 1x looks great (but very small).
I'm not trying to be picky or bash the emulator itself, it's an impressive feat to emulate anything especially in java. I've just been spoiled by shaders and HQ filters on older system emulators and increased internal resolutions on dolphin and pcsx2. But I don't know much about java or programming in general, so maybe it would be too much to increase the pixel count. I don't know, I'm just making a suggestion.
And also let's not forget that full screen toggle hotkey which would be very convenient (like how most apps use Alt+Enter or a F# key). I had to mess around with the launcher utility to even get full screen working correctly. The option to choose the full screen resolution could be done away with completely since it's supposed to auto-detect desktop resolution with the default setting anyway. And since the internal resolution isn't enhanced, there really doesn't seem to be a point to choosing a resolution that doesn't match the desktop resolution.
I'm not trying to be picky or bash the emulator itself, it's an impressive feat to emulate anything especially in java. I've just been spoiled by shaders and HQ filters on older system emulators and increased internal resolutions on dolphin and pcsx2. But I don't know much about java or programming in general, so maybe it would be too much to increase the pixel count. I don't know, I'm just making a suggestion.
And also let's not forget that full screen toggle hotkey which would be very convenient (like how most apps use Alt+Enter or a F# key). I had to mess around with the launcher utility to even get full screen working correctly. The option to choose the full screen resolution could be done away with completely since it's supposed to auto-detect desktop resolution with the default setting anyway. And since the internal resolution isn't enhanced, there really doesn't seem to be a point to choosing a resolution that doesn't match the desktop resolution.