Whle waiting on Yaba Sanshiro I decided to try Yabause. I was pleasantly surprised it's not completely useless. If you overclock Retroarch some games play full speed. I beat the first stage of Shinobi Legions, and Panzer Dragoon Saga and Panzer Dragoon II Zwei seemed to play fine although I didn't play them a whole lot, Enemy Zero played fine. Shining Force III Episodes 2 and 3 worked but Episode 1 would not, and rpgs like Albert Odyssey and Dragon Force seemed to play fine, and also Legend of Oasis, Golden Axe The Duel and Dark Legends all seemed at or near full speed to me.
However save states seem to be completely broken I get a crash every time I tried one on Retroarch 1.7.9.