I've been playing Robotron using Mame v155 on Windows7/3770k/8GB/SSD/Nvidea650). I am using a PS2 controller with a USB Converter. Works ok but there's always been some lag and the game seemed harder to play on the PC than the real arcade machine.
I took home my MacPro laptop from work (i7/16GB/SSD) and loaded openEmu to see if it played as good as the PC. I used the same PS2 controller with a USB Converter on the mac. I displayed the game on my 27" 1080p LCD so the game would look the same as on my PC.
To my surprise there was less lag from the joystick response using the Mac. Movement was definitely more precise allowing me to zig-zag by grunts without getting hit. Also it seemed like the game played smoother. Everything moving looked smoother in motion.
Is it possible that openEmu/Mac plays games better and smoother than on Mame/Windows7? Maybe Mac OS(which is unix based) runs smoother than Windows7 making the game more precise? Anyone else experience this?