Strange lag for 1.12.2

[Zoom_226]

So my friends and I run a forge server (its run off of my friends computer), and we have always played 1.7.10. Recently we decided to upgrade to 1.12.2 after our old server died (it was some weird problem where the server just randomly wouldn't load anymore). We went through getting new mods and corresponding mods to what we had prior, and now our server cant run because it is so laggy. I tried playing single player, and it is almost unbearably laggy too. The game tells me I'm running around 10 fps, which is odd because the game ran just perfectly fine on 1.7.10. I tried stripping our mods down to basically only what we had on 1.7.10, and still the incessant lag persists. I can't remember my friends computer's exact specs, but I know he has put over a thousand dollars into that thing. My computer isn't quite as good as his, but I usually don't run into this much of a problem when playing any other game. Anybody have any idea whats making it so laggy and how we might be able to fix it? I don't understand when we haven't changed that much from 1.7.10. I know there's a big version difference but can that really account for this huge lag spike? Also yes, we have allocated more ram. My friend allocated 4gb to the server and it reports he has 70% available when the server is running. And I upped my client side to about 3gb. We’re running the latest version of forge for 1.12.2. Any help is greatly appreciated!

Edited September 4, 2018 by Zoom_226

[Animefan8888]

10 minutes ago, Zoom_226 said:

The game tells me I'm running around 10 fps, which is odd because the game ran just perfectly fine on 1.7.10.

This is a problem on your side, assuming that your friend is also not experiencing this problem.

 

What are your video settings and system specs.

[Zoom_226]

My friend is also experiencing the extreme lag on his high end rig, when it was almost non present for both of us on 1.7.10. But my system specs are AMD Athlon X4 760K quad core 3.80 GHZ processor, 8 GB of Ram, the game is run on a 500 GB Samsung SSD, and I have a Radeon R9 270 Graphics card. My graphics are on fancy, render distance is 12 chunks, clouds are fancy, particles are on all, VSYNC, VBO, and shadows are on, Smooth lighting is at Max, and max frame rate is set to unlimited. 

[Cadiboo]

What mods are you using?