bnewbold@eschaton$ cargo profiler callgrind --bin target/debug/ucp -- /tmp/dummy localhost:dummy --no-crypto

Profiling ucp with callgrind...

Total Instructions...10,403,177,656

2,204,020,815 (21.2%) socket.rs:socket::UtpSocket::recv
-----------------------------------------------------------------------
2,159,914,683 (20.8%) socket.rs:socket::UtpSocket::send_packet
-----------------------------------------------------------------------
936,415,826 (9.0%) ???:__GI_memset
-----------------------------------------------------------------------
[...]