How do we exec a julia program for competitive programming?

Hey everyone.

I want your idea to exec a julia program quickly and usefuly for competitive prgramming.

You may not know competitive programming.
It is

A programming competition generally involves the host presenting a set of logical or
mathematical problems to the contestants (who can vary in number from tens to several thousands),
and contestants are required to write computer programs capable of solving each problem.

[https://en.wikipedia.org/wiki/Competitive_programming]

I am a user at AtCoder.
AtCoder is a competitive programming site. [https://atcoder.jp/?lang=en]
Next week, AtCoder seeks methods of language install, compile and exec from AtCoder users.

Its environment is Ubuntu 18.04.
Here are some its fotmats from 2016 (I translate this Japanese to English).

language version compile command execute command object file file extension library
c GCC 4.9.2 gcc-4.9 -O2 -o {dirname}/a.out {dirname}/{basename} -lm {dirname}/a.out {dirname}/a.out c no
Julia 0.4.2 please, anyone help julia {filename} jl no
install procedure
"$ sudo add-apt-repository ppa:staticfloat/juliareleases
$ sudo add-apt-repository ppa:staticfloat/julia-deps
$ sudo apt-get update
$ sudo apt-get install julia"

[https://docs.google.com/spreadsheets/d/1X5Yk5PiGx-Otm1JaHpQQzQhEIPj8trofLTkphKX43s0/edit#gid=0]

I think that it can be imporoved more.

For example

Time limit of exec command is 2 sec on AtCoder.
Now, normal Julia doesn’t have any aot way, and JIT compile needs a little milli sec.
I am going to suggest PackageCompiler.jl[https://github.com/JuliaLang/PackageCompiler.jl] that can precomile.
But, I tested it which isn’t so fast on my environment.

Please tell me your ideas of install, compile, exec, library, etc… .