[flohofwoe]

Expecting jump tables to have higher performance than the alternatives sounds definitely iffy, this also reads as if the author doesn't know that switch-case statements also just use a jump table under the hood if the case-blocks are continuous.

Regarding performance, if the CPU branch predictor works well the jump indirection overhead might disappear completely, but that's still not as good as if the compiler can inline the destination function, and jump tables usually prevent that.

(a switch-case dispatcher might actually be better than a traditional function pointer jump table, because the switch-case eliminates some function entry/exit "ceremony", also see "computed goto")