It is not just a shortcut to launching games trought adrenaline without launching adrenaline itselft?
Any adrenaline shader is supposed to add 1 frame of lag, so if all your bubbles are defaulting to "original" scaling, yes they will be a bit snappier.
Too busy using bubbles. Not sure I can even navigate to my games in Adrenaline menu anymore...Thats what I thought till actually using it. Don't quite get the logic as to why it would be this way but it is.
Same settings in both options and have tested switching them. Bubbles are definitely more responsive. Try it yourself.
You're both wrong as there is MIPS hardware in the Vita. Of course nobody has delayered the main SoC to prove it (there are reports behind expensive paywalls though). However, the main RAM in the psp hardware is shared with the Vita, and kermit is used to implement many of the devices (memory card for example). DMA is used for the screen buffer and a shared sram is used for other things like control input and such. A simple heuristic for reasoning that it's not emulated (but not the only reason): consider every file in the vita os0: vs0: dump that relates to the PSP. Of course we can't decrypt them, but looking at the sizes, if you remove the flash0 files (which of course takes up a lot of space), the "emulator" is ~100kb total; that's impossible without some hardware. You can compare this with the size of PSP emulator on the PS3.
You can reduce the lag by using vita launcher. I don't know the ins and outs of it but booting a ps1 or psp game from there directly results in considerably less input lag compared to going through adrenaline to launch.
I play the psp version of everybody's golf and through adrenaline, with a shader on, getting the timing right on a shot is really difficult.
Launching the same game through vita launcher, even with a shader, is miles better. It's not "perfect" but if you werent looking for the lag, you'd struggle to tell.