Paint_Ninja

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Thanks. Could you show me Forge 1.19.4 please? You mentioned earlier that Forge 1.20.1 used to run fine, do you remember if anything changed since then?

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Update your graphics drivers to the latest recommended version. https://www.amd.com/en/support

Are you referring to now or in the past? Because if it's in the past and you can't reproduce it now then I can't help you there Is the performance better in Forge 1.19.4?

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According to the two spark reports, the performance should be about the same... Can you press F3 in both and screenshot the debug screen showing the FPS and the like?

Update your graphics drivers

https://www.curseforge.com/minecraft/search?page=1&class=mc-mods&gameFlavorsIds=1&sortType=1&pageSize=20 Download the right version and put it in the mods folder.

Looking at the Spark report of the empty Forge install, it looks like you're allocating an excessive amount of RAM, causing the game to spill over onto your much slower SSD/HDD (aka swap space) which can cause lag spikes like you're seeing here. Your physical memory is practically full and you've got another 20 gigs or so spilled over onto your storage. To solve this, allocate less (e.g. 4GB is usually enough for large modpacks, 2GB is fine for smaller ones) and close some background apps while the game is open.

Thanks, but I need two reports - one of Forge and one of Fabric - both the same modpack or combination of mods. This is so I can compare and identify any issues with the Forge versions of the mods or Forge itself.

What version of Forge? Walk me through how you're trying to install Forge

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Update your graphics drivers - the ones you're using are a very old beta version. You want the one labelled "Recommended". Avoid "Optional". https://www.amd.com/en/support

This is the Forge forums, we do not support Fabric here.

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The version you are using is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

The version you are using is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

Some simple things to try first: - Set the chunk builder to threaded rather than semi-blocking - Set the simulation distance 2 chunks lower than the render distance (e.g. sim dist 10, render dist 12) - Update your graphics drivers Next up, we'll grab a Spark report which'll provide some game environment details: https://www.curseforge.com/minecraft/mc-mods/spark 1) Run /sparkc profiler 2) Wait a couple of mins 3) Run /sparkc profiler --stop and copy-paste the results link here Please provide separate spark reports for Forge and Fabric. By the way, please use https://gist.github.com in future. Normal GitHub is meant for source code.

Remove the totaldarkness mod - it's intended only for use on clients and you've installed it on a dedicated server.

It's not listed in the log because he's using 1.20 instead of 1.20.1.

Please run a Spark report to help us diagnose this and identify the laggy mod(s) in question. https://www.curseforge.com/minecraft/mc-mods/spark 1) Run /spark profiler 2) Wait a couple of mins 3) Run /spark profiler --stop and copy-paste the results link here

Delete the config file for iron furnaces in the config folder.