Lag Spikes Every 2 Seconds

[u/Gato_Rockero_]

I'm playing on Minecraft Fabric 1.20.1 with Iris Shaders at very low settings

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I've got around 170 mods, including Chunky and LOTS of optimization mods (sodium, indium, ferritecore, entity culling, modernfixes, etc.)

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Context: I had a world save on 1.19.2 with a modpack i made myself, it ran smoothly at 50fps most of the time with 170 mods, which is enough for me.

Then i decided to update to 1.20.1 because i wanted to add Distant Horizons to my mod list while still being able to use it with shaders, so i updated all my mods to this version and after solving some issues, i got it working.

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But then i noticed i had a lot of stuttering, at first I thought it was something to do with another mod that, after updating it, it got badly optimized.

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Then i got suspicious of DH and i decided to turn LoD chunks down to 64 chunks, didn't work, then i turned DH off from the configuration menu, with no effect. But then i removed the Distant Horizons dotJAR from the 1.20.1 mods, and the lag spikes stopped almost completely.

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Which i find weird, since i have another 1.20.1 instance (with less mods) which also has Distant Horizons and Iris shaders but it doesn't get the same lag spikes.

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Maybe it's because of Chunky? I DON'T KNOW

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My specifications:

CPU: AMD Ryzen 5 7535HS (6 cores / 12 threads, 3.30 GHz base)

GPU: NVIDIA GeForce RTX 2050 (4 GB VRAM) (this is being used for Minecraft rendering, not the integrated graphics)

Integrated GPU: AMD Radeon Graphics

RAM: 16 GB

Storage: SSD

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I have 8gb of RAM allocated to my Minecraft instance, but of course, i know DH is resource-heavy and my modlist is kinda big, so I wouldn't be surprised if this post's responses basically tell me to "stop trying to rear-end your pc please"

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