added chrono time measurement

main.cpp

@@ -5,6 +5,9 @@
 
 #include <GLFW/glfw3.h>
 #include "vulkan/vulkan.h"
+#include <chrono>
+#include <thread>
+
 
 VkInstance instance;
 VkDevice device;
@@ -172,7 +175,16 @@ void startVulkan() {
 
 void gameLoop() {
     while (!glfwWindowShouldClose(window)) {
+        auto start = std::chrono::steady_clock::now();
+
+        std::chrono::system_clock::now().time_since_epoch();
         glfwPollEvents();
+        auto end = std::chrono::steady_clock::now();
+
+        std::cout << "Frequency : "
+             << 1000000 / (int)(std::chrono::duration_cast<std::chrono::microseconds>(end - start).count())
+             << " fps" << std::endl;
+        std::this_thread::sleep_for(std::chrono::milliseconds(20));
     }
 }