“Merged Hitachi SuperH CPU cores and implemented a preliminary SH3/SH4 recompiler. [David Haywood] Recompiler is currently enabled for Cave CV-1000 but disabled for Sega NAOMI. Recompiler can more than double the benchmark speed of CV-1000 games.”
Fingers crossed for a (much) better performance on android devices 
I can confirm there is a crazy speed boost with cave games. My cab has an older i5 2400 and cave games only ran at 60-70 on newer mame builds.
They all run at 100% now. Couldnt of come at a better time, I pieced together a g3258 oc rig specifically for this driver and was ready to pull the trigger this weekend.
My excitement was short lived. Apparently ARM will not take advantage of these optimisations, as a guy replied to me on reddit there’s no ARM backend for the recompiler 
(i’m not versed into technical stuff but it sounds game ending)
DU: Cave 1st Gen emulation accuracy project launch.
By Smitdogg
"With many Cave games it is especially important to get extremely accurate emulation because they were programmed with the pushed limitations of the original hardware in mind when making them, maxing them out to the point of slowdown often. In order to get mame closer to the PCBs we can send boards to Phil Bennett and he’ll add them to his work list and will be able to perfect things like video timings and pixel data. For example in ESP Ra.De. the game slows down more on the PCB than in mame, and it sometimes has sprites disappear when there is “too much” on screen, and it actually makes a cool looking overload effect on the PCB and a timing that makes survival slightly easier, something obviously important if acuracy is your goal. Something similar happens with Progear and other games. We need a deeper testing by Phil.
I sent the CPS1 setup mentioned here a while ago to Phil, it will arrive in a few days. I hooked up a mix of several CPS1 games. He will be able to get a large range of testing done and the emulation updates I’m sure will be awesome.
If anyone has a 1st Gen Cave game PCB they will loan to Phil (not asking for donations with these wildly expensive PCBs), let me know, and let’s get this emulation of these games perfected so when your board dies your heart doesn’t. :-)"
Real men play these games with Cpu Overclock on max. 
of course, but first we need to be able to freackin play them 
Not to beat on a dead horse, but can something be done for the changes in 0.191 to be compatible with android platforms as well?
this has probably got to do with dropping support for 32bit system, right?