Toni Wilen

I don't know (and I don't want to know, too much x86 assembly..) much about JIT but ADDX (and SUBX) appears to be fully supported without falling back to non-JIT...

"Not enough information" (and "buy a new PC" is the best answer to that kind of attitude) and because no one else has reported anything similar, there must be something...

I finally added roms and descramblers from your patch + my own model/revision detection (I didn't want to have extra models variables in common code)

Did older versions have similar slower speed? There shouldn't be any 64-bit vs 32-bit differences except JIT.

Could you confirm if 4.9.0 and 4.4 has same problem? Download zip package and temporarily overwrite winuae.exe, there is no need to install anything.

Ok, so it isn't some new problem. Does same 32-bit vs 64-bit difference also happen without JIT? (If you used JIT originally), Same difference also in windowed vs fullscreen? (Make...

Thanks. It probably means 64-bit has always been "slow" in this situation. I am not sure if I can fix it because I am not that familiar with JIT (Also...

Did you try smaller JIT cache? It can be faster in some situations (as I said in previous post) I assume CPU benchmarks returns similar results? (at least I get...

This is quite interesting. What is your laptop CPU model? (full model information). I suspect it is CPU cache related.

Feels familiar, I think this can also happen on real world. Probably some crack issue, possibly depends on relative positioning between tracks or something else undefined that ADF can't handle....