The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/11/jit.html
Description:
I did not see any remarks about the interaction between JIT and prepared
queries. It would be useful to document whether prepared queries benefit
from reusing JIT output, and whether JIT output is cached for non-preplaned
queries (I assume not, for the same reasons the planner is rerun).