I've used libtins (a C++ wrapper on libpcap) for its high-level interface before and enjoyed it. Some benchmarks in the README indicate this library has marginal-to-significantly better performance: https://github.com/seladb/PcapPlusPlus

Comparing to http://libtins.github.io/benchmark/ at a glance it looks reasonable - libcrafter is a lot slower than both, and libpcap is often much faster. (scapy (Python) is really, really slow.)

Personally, if I was using libtins and really needed more perf I'd strongly consider just using libpcap directly. But the high-level APIs are really handy.

I don't have anything substantive to say about PcapPlusPlus but I'll check it out :)