Contribute source code: Julia binary trees

CONTRIBUTE SOURCE CODE

Removing the type annotations from the struct in the fastest Julia binary trees implementation actually results in a 10% speedup compared to the Julia 3 implementation. Rewrote instead of modifying Julia 3 to make the code slightly more concise.

Provide a helpful Title

Julia binary-trees Adam Beckmeyer

Attach your source code file

binary-trees-ab-untyped-struct.jl

Provide an example build command-line

julia -p 4 binary-trees-ab-untyped-struct.jl 21