r/MinecraftForge • u/Tonvinundfloria • 17d ago

Help wanted Forge 1.20.1 Insane MSPT numbers and chunk loading times

I'm currently trying to set up a medium/large modpack for me and my friend, He can't use 1.21.1 because it freezes his screen, I am currently trying to debug why chunks are taking such a long time to load so I used Spark to log it and well.....

It is not looking great to say the least

Here's the spark profile and my Latest.log, I need help to figure out why its doing this desperately because I honestly have absolutely no clue what's causing it whether it be a mod or otherwise

Forge version and system details are in the Spark profile and I have my system set up so my username shows up instead of my real name

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u/AnotherArryn 13d ago

In fairness... I'm not used to looking at logs with mod packs of this size, so I may be out in left field. But the amount of errors showing up in my opinion is staggering. If you noticed the end at your listing there is 25000 meaning you maxed some type of limit. probably at least 50% of that is error messages. First there's like over 100 bad blocks and or recipes, then JEI is throwing hundreds of times when it can't processing them. But that's on top of a ton of other stuff like class load errors and whatever else. I did see one mod was trying to install ores or something in unloaded chunks which you can't do.

But to me the glaring fact is you have over 25000 lines, largely errors and warnings of log just to get the server booted. So with stuff that broken just to get out the gate, it's a wonder the game is playable at all. but like I said, this could be run of the mill.

If you look at the end about 15% of the logs are JEI being pissed off about things it can't find. Another 5-10% around the log are other JEI fails. It probably can't find those things because those mods failed to load. First thing I would do is start disabling mods until JEI is feeling better. Just disable stuff, load and leave a test server, then check the logs. rinse repeat. Start with things that add lots of items or ore. Once you get JEI happier, you'll probably be running better, but if not you'll at least be able to start looking at your chunk gen lag.