I'm having terrible chunk loading performance when using Terrablender and Rubidium together in 1.19.2. I used to have a similar issue in 1.18.2, but I had fixed it by switching from Radium Reforged to Canary. This time around, Canary helps with increasing chunk loading speed, but it's not enough, and removing Rubidium fixes it, though doing that of course worsens the overall performance. The speed of the chunk loading isn't necessarily tied to fps, but if I go near an unloaded chunk, the fps will be lower and tps will be massively lower. I think Rubidium has some kind of glitch with Terrablender, because without it, Rubidium has faster chunk loading speeds compared to vanilla.