when i include far sight in my pack it will end up building up the memory and having horrible 5 sec full stutters untill i quit and reload the game.

its triggered after flying around for a bit but the lower you put the memory the faster it happens, but without farsight the spikes will stop again.

https://www.curseforge.com/minecraft/modpacks/chosencraft

I can't reproduce this at all using just farsight, you probably have a different mod causing a memory leak in the first place, this is likely just a "correlation does not imply causation" case. Next time also fill out the template properly, it exists for a reason