btw... version .36 is a good place to start. That was when they changed the bpp (now they are all forced much higher then needed).
basically... to speed things up
1) Go with another emulator (if one exists)
(good ones.. REM! is a GREAT rygar emulator, Gauntet has one, TMNT has one, neogeo should go through any of the others... same with cps2).. Basically a TON of games where first emulated in standalone emulated before being assimulated by the Morg.
2) Go with a version of mame when your computer was considered normal... Mame unoptimizes to add stability or to become more accurate as computers can handle them.
3) Configure it... No hwstretching, Nothing extra (joystick, ect), basic only... add features back afterwards.
4) Dos is faster.. you will get a decent jump (10% ish??)... SDD (sci display doctor? is that the acry?) is now free and will give you native resolutions on most games.
Any others anyone?