option is intended for benchmarking, for production runs leave the
local communication optimization switched on

disabled OpenMP parallelization for intel 17
in a non performance critical section

Michael Kuron authored 6 years ago and Sebastian Eibl committed 5 years ago

so Union<std::tuple<Sphere,Box>> becomes Union<Sphere,Box>

It is not actually used anywhere (since the removal of the old pe), is very hard to read, and essentially contains a custom clone of std::tuple.
If it is ever needed, it could easily be re-implemented using std::tuple and variadic templates in significantly less code.

This is needed to avoid different behaviour
between release and debug builds

Replace boost::{type_traits, enable_if and mpl} with standard library features where (easily) possible