Function logging

less_slow.cpp:6362–6383

template <typename logger_type_>
static void logging(bm::State &state) {
    struct {
        int code;
        std::string_view message;
    } errors[3] = {
        {1, "Operation not permitted"sv},
        {12, "Cannot allocate memory"sv},
        {113, "No route to host"sv},
    };
    char buffer[1024];
    logger_type_ logger;
    std::size_t iteration_index = 0;
    std::size_t bytes_logged = 0;
    for (auto _ : state) {
        bytes_logged += logger(              //
            buffer, sizeof(buffer),          //
            std::source_location::current(), //
            errors[iteration_index % 3].code, errors[iteration_index % 3].message);
        iteration_index++;
    }
    state.SetBytesProcessed(bytes_logged);
}

struct log_printf_t {
    std::size_t operator()(                    //