A few of the smaller benchmarks have been ported to C++ already: https://github.com/smarr/are-we-fast-yet/tree/wip/cpp/benchm...

But the bigger ones are not yet (so, no results yet).

One of the important questions to answer first is how the mapping should be done. A naive version using new/delete/smartpointers is going to have performance issues. Other options would be to use arena allocators and completely remove memory management overhead from the equation. Depending on what comparison/C++ usage scenario is desired, both options would be useful.