Try to put IA in its own thread

src/main_loop.cpp

@@ -36,6 +36,7 @@
 #include "race/race_manager.hpp"
 #include "states_screens/state_manager.hpp"
 #include "utils/profiler.hpp"
+#include <thread>
 
 MainLoop* main_loop = 0;
 
@@ -108,6 +109,9 @@ void MainLoop::updateRace(float dt)
         World::getWorld()->updateWorld(dt);
 }   // updateRace
 
+
+std::thread IAThread;
+
 //-----------------------------------------------------------------------------
 /** Run the actual main loop.
  */
@@ -173,6 +177,8 @@ void MainLoop::run()
         }
 
         PROFILER_POP_CPU_MARKER();
+        if(IAThread.joinable())
+            IAThread.join();
         PROFILER_SYNC_FRAME();
     }  // while !m_abort
 

src/modes/world.cpp

@@ -65,7 +65,7 @@
 #include <ctime>
 #include <sstream>
 #include <stdexcept>
-
+#include <thread>
 
 World* World::m_world = NULL;
 
@@ -763,6 +763,8 @@ void World::scheduleUnpause()
     }
 }   // scheduleUnpause
 
+extern std::thread IAThread;
+
 //-----------------------------------------------------------------------------
 /** This is the main interface to update the world. This function calls
  *  update(), and checks then for the end of the race. Note that race over
@@ -926,13 +928,14 @@ void World::update(float dt)
     }
 
     PROFILER_PUSH_CPU_MARKER("World::update (AI)", 0x40, 0x7F, 0x00);
-    const int kart_amount = m_karts.size();
-#pragma omp parallel for
-    for (int i = 0 ; i < kart_amount; ++i)
-    {
-        // Update all karts that are not eliminated
-        if(!m_karts[i]->isEliminated()) m_karts[i]->update(dt) ;
-    }
+    IAThread = std::thread([&]() {
+        const int kart_amount = m_karts.size();
+        for (int i = 0; i < kart_amount; ++i)
+        {
+            // Update all karts that are not eliminated
+            if (!m_karts[i]->isEliminated()) m_karts[i]->update(dt);
+        }
+    });
     PROFILER_POP_CPU_MARKER();
 
     PROFILER_PUSH_CPU_MARKER("World::update (camera)", 0x60, 0x7F, 0x00);