On the 1.12.2 Carpet mod, there is a Carpet rule that is called TNTmovementOptimization. For feature parity, may you please add TNTmovementOptimization to the Fabric Carpet mod? This feature optimizes TNT movement, rather than explosions, which is useful for cannons.

There is optimizedTNT as well, you can run lithium mod for another optimized TNT implementation. Not sure what that setting in 1.12.2 does.

This setting does not optimize TNT explosions, instead, it optimizes TNT movement. You can take a look at “carpetmod112/patches/net/minecraft/entity/item/EntityTNTPrimed.java.patch” in gnembon/carpetmod112 to get an idea of what it does. Also, is there any risk that the Carpet mod might conflict with the Lithium mod?

From what I remember, the 1.12 tnt movement optimization works by checking the collisions one axis at a time, while not changing vanilla behaviour. It increases performance since it can break earlier in without having to check collisions for all the axis.