[OSX] Steam Multiplayer Slow Loading Times when using same network as host

[Maroochan]

Encountered this problem when trying to join a multiplayer game whose host was on the same wifi network as me. We are using Steam Multiplayer. When connecting, downloading the save file from the host would take upwards of 30 minutes(normal times for MP are ~1min) but would often not finish downloading at all before timing out. If we were able to start the game, the client would lag behind and eventually disconnect.

My router has dual-band capability, so I swapped to the 2.4GHz network and the problem resolved(host and I had been both on the 5.0GHz at time of error). This issue began around the time that Nakama multiplayer was introduced. We also tried both being on Nakama which works, but is somewhat slower.

Have you guys seen this issue of a same-network slowdown for multiplayer before, and is there a fix?

I don't think that this is a hardware issue but specs attached below:

Spoiler: specs

Computer Information:
Manufacturer: Apple
Model: MacBookPro18,3
Form Factor: Laptop
No Touch Input Detected

Processor Information:
CPU Vendor: VirtualApple
CPU Brand: Apple M1 Pro
CPU Family: 0x6
CPU Model: 0xc
CPU Stepping: 0x0
CPU Type: 0x0
Speed: 2400 Mhz
10 logical processors
10 physical processors
HyperThreading: Unsupported
FCMOV: Unsupported
SSE2: Supported
SSE3: Supported
SSSE3: Supported
SSE4a: Unsupported
SSE41: Supported
SSE42: Supported
AES: Supported
AVX: Unsupported
AVX2: Unsupported
AVX512F: Unsupported
AVX512PF: Unsupported
AVX512ER: Unsupported
AVX512CD: Unsupported
AVX512VNNI: Unsupported
SHA: Unsupported
CMPXCHG16B: Supported
LAHF/SAHF: Supported
PrefetchW: Unsupported

Operating System Version:
MacOS 12.0.0 (64 bit)

Video Card:
Driver: Apple G13X
Driver Version: 187.37
OpenGL Version: 4.1
Desktop Color Depth: 32 bits per pixel
Monitor Refresh Rate: 120 Hz
VendorID: 0x106b
DeviceID: 0x0
Revision Not Detected
Number of Monitors: 3
Number of Logical Video Cards: 1
Primary Display Resolution: 1512 x 982
Desktop Resolution: 4536 x 2946
Primary Display Size: 11.85" x 7.68" (14.09" diag)
30.1cm x 19.5cm (35.8cm diag)
Primary VRAM: 32768 MB

Memory:
RAM: 32768 MB

VR Hardware:
VR Headset: None detected

Miscellaneous:
UI Language: English
Media Type: DVD
Total Hard Disk Space Available: 5718185 MB
Largest Free Hard Disk Block: 4581323 MB

Storage:
Number of SSDs: 0
Number of HDDs: 0

 

[AndrewT]

When using Steam MP, all traffic goes via the Steam servers - being on the same network doesn't change anything.

But from what you say this seems like an issue on that 5GHz wifi network rather than a game or Steam problem. Have you rebooted or reset that router?

 

[Maroochan]

When using Steam MP, all traffic goes via the Steam servers - being on the same network doesn't change anything.

But from what you say this seems like an issue on that 5GHz wifi network rather than a game or Steam problem. Have you rebooted or reset that router?

Still seeing the issue when the router is reset. Not seeing the issue in HOI4, surprisingly.

 

[AndrewT]

You tried HOI4 in both Steam and Nakama modes I guess?

But either way, I have no real explanation for what you are seeing there.