fix slowness round 2 and fix socket down detection

repertory/librepertory/include/comm/packet/common.hpp

@@ -116,8 +116,6 @@ inline void run_with_deadline(boost::asio::io_context &io_ctx,
 
   timer.cancel();
 
-  io_ctx.poll();
-
   if (state->timed_out) {
     repertory::event_system::instance().raise<repertory::packet_client_timeout>(
         std::string(event_name), std::string(function_name));

repertory/librepertory/src/comm/packet/common.cpp

@@ -45,6 +45,10 @@ auto is_socket_still_alive(boost::asio::ip::tcp::socket &sock) -> bool {
   non_blocking_guard guard{sock};
 
   boost::system::error_code err{};
+  std::array<std::uint8_t, 1> tmp{};
+  [[maybe_unused]] auto available = sock.receive(
+      boost::asio::buffer(tmp), boost::asio::socket_base::message_peek, err);
+
   if (err == boost::asio::error::would_block ||
       err == boost::asio::error::try_again) {
     return true;