Hiccups in turbonyma when rewind is enabled, due to epic >3GB GCs (test in Final Soldier)

So since I found out about TurboNyma I been playing as my TG16/PCE as I can testing and enjoying.

Today I went to play final soldier. Tested on like 7 builds even latest one. the odd time it jitters vertically almost like a vsyn problem.

Tested on 3 computers all with nothing at all incommon.

the i tested on the latest official mednaffen no jitter ever at all.

if you play one level you will get approx 5 to 7 jitter. very subtle but if you are picky you will notice.

reproducable 100% of the time.

did more testing sure enough in many games where there is alot going on scrolling will seem not smooth at times using TurboNyma.

Here is my tests.

Official Mednafen smooth
Bizhawk with PCEHawk SMooth
Ootake smooth
Magic Engine 1.13 smooth

Bizhawk with TurboNyma and Turbo Turbo Nyma the odd skip.

Best game to test with Final baster as it happens multiple times per level.

Not complaining just reporting.

I dont understand how waterboxing works but this is either memory limit or graphics api I assume.

tested on may systems, on win 7 and 10

big cpu big video card big ram.

narrowed down. its a rewind issue...

disable rewind solved issue

[YoshiRulz]

Rewinding with TurboNyma works out-of-the-box as of 03d10ce, I'd say natt fixed it since you tested it. If you run into more issues with rewinding we can re-open this.

[zeromus]

Issue fixed by "disable rewind" is not fixed. Please check without disabling rewind. If rewind breaks something, it is an early sign of a big problem.
Issue is still interesting, but most likely broken/overheating systems and not certainly not a core sync bug

I have done more testing. default rewind settings. try this game you will start to notice sticking the odd time per level 100% of the time.

However if I disable use delta compression problem goes away.

Im an IT manager with access to ALOT of hardware.

I tried throwing this at some VERY VERY high end systems. And it still happens.

If there is anything I can do to help rove this or test let me know.

If you guys can test it out and see what happens.

The strongest system i tested on i9-109000k with 32 gb ram

the weakest system i5-4570 with 8 gb of ram

So I dont think its that my system is too weak.

For me a simple solution I just leave delta off for now.

This happens in other games. Im mentioning final soldier as here it is easy to notice every time.

if you do a full level one play through with it on vs with it off you will notice for sure.

hope what im saying helps, and once again thanks for this emulator!

[zeromus]

I doubt anyone knows what you mean by "5 to 7 jitter". Can you please describe it differently, in more detail?