Loading the GMT.jl package (using GMT) is very slow (~10 s) for the first time, because Julia needs to precompile the GMT.jl package. It would be better to precompile the package when building the docker image, so that the package is already precompiled when users run using GMT.
As I understand it, running julia -e "using GMT" may do the precompiling.
@joa-quim Is it correct? Is there a way to precompile all Julia packages?