FerriteCore (Fabric)

FerriteCore (Fabric) reduces Minecraft's memory usage, with savings varying by modpack. Available for Fabric and Quilt on Minecraft 1.16.5 - 26.2, it includes optimizations relevant to both clients and servers, so the author recommends installing it on both sides.

Give your rented Minecraft server the same memory-saving optimizations by installing FerriteCore with one click from the server panel.