As stated on asio-users mailing list ( https://sourceforge.net/p/asio/mailman/asio-users/thread/CADfydx%2BDF1kvqchV... ), I wrote a patch that enables sendmmsg / recvmmsg on supported operating systems (Linux, [Free/Net/Open]BDS, AIX, Blackberry QNXNeutrino). The syscalls are implemented in reactive_socket_service backend (the io_uring backend on Linux does not support sendmmsg / recvmmsg yet, so no recvmmsg / sendmmsg when using newest support for io_uring on asio). The config.hpp has macros for forcible disable those calls, and detect supported operating system compiler macros. New methods were developed for (send/send_to/receive/receive_from) suffixed with '_multiple_buffer_sequence' that accepts a multiple_buffer_sequence class (backed by asio::detail::array<multiple_buffer_sequence_op, N> or std::vector<multiple_buffer_sequence_op>) and a multiple_buffer_sequence_adapter that convert ops to struct mmsghdr* for sendmmsg/recvmmsg. The multiple_buffer_sequence implementations are basically a collection of multiple_buffer_sequence_op instances that represents each socket operation . It defines the objects needed to perform fill on mmsghdr structures buffer_sequence_type buffer_sequence_; buffer_sequence_adapter_type buffer_sequence_adapter_; endpoint_type endpoint_; bool completed_; socket_base::message_flags flags_; std::size_t bytes_transferred_; asio::error_code error_code_; The multiple_buffer_sequence implementations has full container support, iterators, and support Mutable and Const buffer sequences. I finished the first version of the patch. It's able to send and receive 1million packet / second on my box at same time (an intel i9 9900k / ubuntu 22.04 lts low latency kernel) using packet sizes of 64 / 1430 bytes without packet loss (using 64mb udp socket buffers) A little running demo is able to being watched at https://www.youtube.com/watch?v=Q3hqe6ntM3w. I need to write some automatic tests for (async_)[send/receive]_multiple_buffer_sequence calls[_to/_from] and push a pure ASIO example in examples repository I made the code available for review, scrutiny and suggestions. The source code is in my github repo ( https://github.com/virgiliofornazin/asio ),on branch feature/multiple_datagram_buffers_sequence-io-sendmmsg-recvmmsg ( the full URL of patch diff is https://github.com/chriskohlhoff/asio/compare/master...virgiliofornazin:asio... ).