[Bug c++/81476] severe slow-down with range-v3 library compared to clang

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81476

--- Comment #7 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Ah:

-   99.79%     0.02%  a.out  a.out                [.] std::vector<char,
std::allocator<char>
>::_M_range_insert<ranges::v3::_common_iterator_::common_iterator<ranges::v3::_basic_▒
   - 99.77% std::vector<char, std::allocator<char>
>::_M_range_insert<ranges::v3::_common_iterator_::common_iterator<ranges::v3::_basic_iterator_::basic_iterator<ranges::v3::join▒
      - 99.65% std::vector<char, std::allocator<char> >::insert                
                                                                               
                  ▒
           99.63% memcpy@@GLIBC_2.14