How can a console be compatible with PC? Especially a portable console, and one that people still cannot make good emulators for, sure they will have more experience and based on that make the PC runner faster but still the PSP version is completely different, because the hardware, and the way it works is different.
A console can't be compatible with a PC, not at hardware level.
What I'm saying is that YYG will probably abstract everything that talks to the hardware, and make the higher-level stuff - such as the game loop - unified. I'm saying that the code for that will probably be the same for all versions. At the level below that they will need hardware-specific code. At the higher level, there is still a lot of speed to be gained.
Yeah I heard about GM8 being much faster, so I converted DarkVerse to gm8, honestly after some tests I saw no improvements in speed. Maybe i wasn't using features that got optimized? No idea.
I don't exactly know what was improved, but the manual says that things like loading have also been improved. So the improvements are pretty general it seems, but at least you should have noticed faster loading.
Until I see it with my own eyes, I'm not convinced that GM can run any faster without compiling. Because the main reason for GM speed is interpretation, and only compiling gets rid of that.
A more advanced level of bytecode also makes things faster. It's not the same as compiling into machine-code, but the speed gain will be significant.
I think YoYo are going for a Java-like system: they want it to be cross-platform and therefore use bytecode. But that's just my conclusion of what I heard.