Yes, it is assumed that your pc is reasonably powerful.
I forget to mention that I was using a i5 2500k with radeon 6800, which is overkilled for emulating cps2.
I tried the same test on a core2duo 2.4ghz laptop with a mobile 4 series express chip vga, the game play speed is the same.
Game play is 99% ok except when there are fireball slowdown + super, the vga is not fast enough to handle it.
Running it on macbook with 3rd gen i5 hd 4000 graphics it is as smooth as running it on my desktop even in tense situations.
I have no access to a 2nd gen i process with HD 3000 graphics but I assume that would also be sufficient.
Just make sure you have a clean windows installation and no malware adware antivirus heavy duty processes running in the background.
supergun and arcade board are easy. The problems are CRT and custom input. The latter can be solved with undamned’s cps2 but CRT will still be a big problem going forward.
Speed comparison is easy. Just recording the same stage on the same turbo speed and transfer the video to your PC (ideally 60 fps but 30 fps is ok).
Use media player classic Ctrl-G to jump to when “Fight” appears on the screen.
Mark down the seconds to the decimal place and do the same for “Time Over”. Subtract and you got the numbers.