[Bug libstdc++/78113] std::variant and std::visit's current implementations do not get optimized out (compared to "recursive visitation")

[quicknir at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78113

--- Comment #4 from Nir Friedman <quicknir at gmail dot com> ---
Started a PR on mpark github variant: https://github.com/mpark/variant/pull/52.