I pointing out that the Official MAME is way better than MAME for the RetroArch. So many issues on the MAME RetroArch. It lags on some of the scanlines effect. Tempest and some others doesn't run very well on the speed. It just the way RetroArch is written. RetroArch isn't clean for the MAME port.
Official MAME vs MAME for the RetroArch. Official MAME is a winner.
Like I said before I only uses Official MAME on my Windows.
Uses that MAME for the RetroArch on my Android devices only. (Until Official MAME come out for the Android. I will switch to this after it release.)