For best performance: The Rust benchmark is compiled with --opt-level=3, DMD with -release -O -noboundscheck -inline,
GHC with -O3 -funbox-strict-fields and the rest with -O3.

D and Go take the random seed as a command line parameter in the form "-v=int", the rest take it just as plain "int". Be warned, some will segfault without it.