Having tps lags with large modpacks? Is the worldgeneration slow? Then you probably want to find out the mod that caused it. This little mod notifies you in the console (client and server) when the chunk generation takes too long for a specific mod (default 20ms per mod).
[eg.mod.ExampleMod] Chunk (1 - 1) at (16 - 16) took to long to generate (123ms)
Also you will get notified if a chunk generally takes too long (default 50ms = a tick)
[General] Chunk (1 - 1) at (16 - 16) took to long to generate (203ms)
In the configuration, you can specify the maximum period of time from when you want to be warned.
If you notice that a certain mod often took too long for the chunk decoration, then you should write to the mod author. But only if you know that it is not your bad CPU.
This mod can be packed in every modpack you want :)
Sourcecode is linked above and is available under Apache License 2.0.
Issues goes to the Issuetracker linked above.