diff --git a/src/game/gameBasics.cpp b/src/game/gameBasics.cpp
index c01199d..5efc9df 100644
--- a/src/game/gameBasics.cpp
+++ b/src/game/gameBasics.cpp
@@ -114,6 +114,10 @@ void Game::initGame(){
  *
  * @return @WinValue::PLAYERS if the players won, @WinValue::INVADERS is the invaders won, WinValue::NOBODY else (also in case of error)
  */
+
+#define START_TIMER() DEBUG_INSTR(debugTime = chrono::high_resolution_clock::now())
+#define PRINT_TIMER(X) DEBUG_MSG((X) << " :" << chrono::duration_cast<chrono::nanoseconds>(chrono::high_resolution_clock::now()-debugTime).count())
+
 WinValue Game::enterGameLoop(){ // returns when game is finished
 	// computed in advance for performance reasons
 	chrono::milliseconds maxFrameTime = chrono::milliseconds(1000/confData.maxFPS);
@@ -122,7 +126,11 @@ WinValue Game::enterGameLoop(){ // returns when game is finished
 	unsigned fps = 0;
 	typedef chrono::high_resolution_clock::time_point MyTimePoint;
 	MyTimePoint fpsStartTime = {};
+
+	DEBUG_INSTR(MyTimePoint debugTime);
 	while(window.isOpen()){
+		DEBUG_INSTR(fflush(stdout));
+		DEBUG_MSG("------------")
 
 		MyTimePoint startTime = chrono::high_resolution_clock::now();
 		if(fpsStartTime.time_since_epoch()==chrono::seconds(0)){
@@ -131,26 +139,38 @@ WinValue Game::enterGameLoop(){ // returns when game is finished
 
 		pm->startFrame();
 
+		START_TIMER()
 		managePlayers();
+		PRINT_TIMER("manage players")
+		START_TIMER()
 		if(manageInvaders()) { // if they went down
 			if (invadersTouchPlayer())return WinValue::INVADERS;
 			tryAwakeGod();
 		}
+		PRINT_TIMER("manage invaders")
 
+		START_TIMER()
 		if(manageGod())return WinValue::PLAYERS;
 		if(arePlayersDead())return WinValue::GOD;
+		PRINT_TIMER("god")
 
+		START_TIMER()
 		moveMissiles();
 		remCollidingProjectiles();
 		moveTorpedos();
 		remCollidingProjectiles();
+		PRINT_TIMER("self collisions")
 
+		START_TIMER()
 		checkMissilesAndPlayers();
 		if(checkTorpedosAndInvaders())return WinValue::PLAYERS;
+		PRINT_TIMER("collisions between entities")
 
 		if(arePlayersDead())return WinValue::INVADERS;
 
+		START_TIMER()
 		displayAll(fps);
+		PRINT_TIMER("display")
 
 		pm->endFrame();