Ryxas

You're my hero, it worked! Thank you so much.

I have tried it at 1, 4 and 8 GB as well. None of which affected this problem. As stated in the post I have tried removing all mods, including optifine, and just running forge empty. The problem persists.

So, I recently spent roughly 10 hours building a 66 village "Iron Titan" on my survival world. I'm currently running forge 1.12. I won't bother listing the mods I have installed because I backed them up, removed them and ran the game with no change in my massive lag spikes. My computer is more than beefy enough to handle playing with ultra settings using a shader pack and keep a consistent 100fps. So ultimately my question boils down to what in forge is creating these massive lag spikes. For reference when I say massive I mean every 5-10 seconds my game almost freezes for 2 seconds and then goes back to normal. I will note that I have tried reducing all visual specs to the lowest settings without change. The only thing that I've done to my world that I can think would affect forge like this is that I have a portal set to spit an item out every 8 seconds give or take. This should keep the spawn chunks in my memory so that my 66 villages don't merge together and ruin my work. I thought that the redstone in the spawn chunks was the culprit until I looked at my debug and found that only 8% of my resources was going to tick. I've tested this issue in vanilla and in forge without mods. Vanilla runs perfectly normal (second image), where as Forge is stuttering my game (first image). Please help.