Massive Slowdown in Offline Battles after connecting to Wiimmfi (MKW)

ventord · 23. Januar 2021, 19:46

Hello there. I think no one has reported this yet. I'm posting on this subforum because I'm 90% sure that this is Wiimmfi-related.

So I've been experiencing a massive slowdown when playing battles on single player. I noticed that this happens everytime you connect to Wiimmfi and then you go offline. When you start a battle (either Balloon Battle or Coin Runners), at first everything is normal, but in the final minute, the game starts to lag a lot. It goes from 60 to 25~18fps.

I think this has someting to do with the Wiimmfi patchers, because when I launch the game again and go straight to offline battle (without connecting to Wiimmfi first) the issue doesn't occur.

How to reproduce the issue:

-Start MKW
-Connect to Wiimmfi at least once
-Disconnect from Wiimmfi
-Go to Single Player and select Battle
-Wait until the final minute of the battle (sometimes it lags even before the final minute)

Patchers I used:
-Priiloader's Wiimmfi patcher (loaded the game through Disc Channel)
-ISO patcher (loaded the game through an SDHC card).

(I'm using the NTSC-U version of the game)

Matze167435 · 23. Januar 2021, 21:07

I noticed this too. It sometines also happens online if the room has many players and much stuff is going on.

Leseratte · 24. Januar 2021, 09:56

Indeed, looks like there's something fishy. I started a stopwatch when there were two minutes left in the battle, and at the end when the battle was over the stopwatch showed 2:20 instead of 2:00.

I don't really have an idea what's causing this yet, but I will definitely take a look and see what I can find.
Do you know if this also happens in Online battles on Wiimmfi?

Matze167435 · 24. Januar 2021, 13:06

I don't remember the timer getting affected online, but sometimes there is apparent frame skip for a few seconds. Before this mechanic was introduced there rarely were performance issues, and if there were, it was only a tiny spike.

Leseratte · 24. Januar 2021, 13:11

Before what mechanic was introduced? I was suspecting the frameskip code as well and made a test version without that, but the lag was still present.

Matze167435 · 24. Januar 2021, 13:22

Before the frame skip mechanic was introduced (at least i think so, it started to happen with or slightly after the required update).

Leseratte · 24. Januar 2021, 14:11

Okay, I might have found the issue (unrelated to frameskipping), now I just need to figure out the best way to fix this. I'll let you know when that's done.

ventord · 24. Januar 2021, 14:48

Leseratte schrieb:

Do you know if this also happens in Online battles on Wiimmfi?

Yes it happens online, but it's less frequent and happens when the room has many players (11-12 players). It's more noticeable in Offline.

Leseratte · 24. Januar 2021, 14:57

I now have a beta test version that should fix this, at least for offline.

Can you please go to wiimmfi.de/payload/settings and set your console from "Public" to "Beta" (in the "Payload settings & Ports" section is a column "Payload Branch"), and then restart the console and see if the issue is gone?

If it is, and the update doesn't break anything else I'll make that available to everyone.

For the online mode I'll still need to think about how to best fix this.

EDIT: The beta also contains a fix for online.

ventord · 25. Januar 2021, 20:04

Okay I've tested now the beta payloads, and it is indeed working; the lag is gone for offline battles. I played a few offline and online VS races too just in case and everything seemed to work fine. I also played two online battles and everything was fine too, however I couldn't find a full room (There were only 5 players). If anyone wants to test online battles a bit more, feel free to do so (I don't have more time to test).

Leseratte · 29. Januar 2021, 13:29

The bugfix should now be active for everyone.

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