When using Farseek / Streams with 1.11.2;
(After flying around for a while in creative mode)

"Farseek loaded a new chunk (54, 50 Dimension: 0) during chunk population, causing cascading worldgen lag. Please report this to the mod's issue tracker. This log can be disabled in the Forge config.
[00:48:27] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2390ms behind, skipping 47 tick(s)"

I do not know that much about the cascadind world-gen issue but apperently many mods are fixing this lately (since its displayed by forge.) When this log message appeared in my multi-mc console, the world stopped generating or was building up very slowly. Can you fix this in your mod too?

:(

Thanks for reporting! I'll look into this in the next few days and get back to you.

the mod told me to report this, so here I am. This is a TINY portion of the log, which was to big even for pastebin. There were no other problems other than the engorged log file.

[18:16:57] [Server thread/WARN] [FML/]: Farseek loaded a new chunk (2, -1 Dimension: 4) during chunk population, causing cascading worldgen lag. Please report this to the mod's issue tracker. This log can be disabled in the Forge config.
[18:16:58] [Server thread/WARN] [FML/]: Farseek loaded a new chunk (-3, 4 Dimension: 4) during chunk population, causing cascading worldgen lag. Please report this to the mod's issue tracker. This log can be disabled in the Forge config.
[18:16:58] [Server thread/WARN] [FML/]: Farseek loaded a new chunk (1, -2 Dimension: 4) during chunk population, causing cascading worldgen lag. Please report this to the mod's issue tracker. This log can be disabled in the Forge config.
[18:16:58] [Server thread/WARN] [FML/]: Farseek loaded a new chunk (0, -2 Dimension: 4) during chunk population, causing cascading worldgen lag. Please report this to the mod's issue tracker. This log can be disabled in the Forge config.
[18:16:58] [Server thread/WARN] [FML/]: Farseek loaded a new chunk (-1, -3 Dimension: 4) during chunk population, causing cascading worldgen lag. Please report this to the mod's issue tracker. This log can be disabled in the Forge config.
[18:17:05] [Server thread/WARN] [FML/]: Farseek loaded a new chunk (28, 1 Dimension: 4) during chunk population, causing cascading worldgen lag. Please report this to the mod's issue tracker. This log can be disabled in the Forge config.
[18:17:05] [Server thread/WARN] [FML/]: Farseek loaded a new chunk (-1, 24 Dimension: 4) during chunk population, causing cascading worldgen lag. Please report this to the mod's issue tracker. This log can be disabled in the Forge config.

I'll just say, my Server got the same Issue with the following Versions:
Minecraft 1.11.2
Forge: 1.11.2-13.20.0.2315
Farseek: 1.11-2.1
Streams: 1.11-0.3

Should be the latest Versions available as of now.
If u need the Logs just tell me and i'll pastebin em.

I have the same issue also,
Minecraft 1.11.2
Forge-13.20.0.2366
Farseek-1.11-2.1
Streams-1.11-0.3

Thanks to all for reporting, I should have enough data to work with for now. I have a performance fix that I'm forward-porting from 1.7.10 to 1.9/1.10/1.11 currently, we'll see if it addresses this.

Fingers crossed!

Also, If you look up the issue, there are many modders that also have this issue and I believe some might have a fix so it might help you.

I was wondering if you discovered a performance fix? I too encountered this issue as I'm generating sprawling dungeons that force chuck generation.

Streams 0.4 is out and includes an experimental worldgen performance improvement. Please let me know if you still see this warning in your logs.