Merge pull request #12 from TECHNICANGEL/perf/optimize-window-title-update-1226180534073299234

⚡ Optimize window title update frequency to 4Hz

Author: TECHNICANGEL

benchmark_snprintf.cpp

@@ -0,0 +1,28 @@
+#include <cstdio>
+#include <chrono>
+#include <iostream>
+
+int main() {
+    const int iterations = 1000000;
+    char title[256];
+    float currentFPS = 60.0f;
+    float frameTimeMs = 16.66f;
+    uint32_t totalSamples = 12345;
+    float posX = 10.5f, posY = -5.2f, posZ = 100.1f;
+
+    auto start = std::chrono::high_resolution_clock::now();
+
+    for (int i = 0; i < iterations; ++i) {
+        snprintf(title, sizeof(title),
+                "IZTAPALAPA PATH TRACER | FPS: %.0f | %.2fms | %u samples | Pos: (%.1f, %.1f, %.1f)",
+                currentFPS, frameTimeMs, totalSamples, posX, posY, posZ);
+    }
+
+    auto end = std::chrono::high_resolution_clock::now();
+    std::chrono::duration<double> elapsed = end - start;
+
+    std::cout << "Time for " << iterations << " snprintf calls: " << elapsed.count() << "s\n";
+    std::cout << "Average time per call: " << (elapsed.count() / iterations) * 1e6 << " microseconds\n";
+
+    return 0;
+}

src/main.cpp

@@ -769,6 +769,7 @@ class RacingEngine {
         int fpsFrameCount = 0;
         float currentFPS = 0.0f;
         float frameTimeMs = 0.0f;
+        float titleUpdateTimer = 0.0f;
 
         // Initialize temporal accumulation tracking
         lastCameraPos = camera.getPosition();
@@ -838,14 +839,18 @@ class RacingEngine {
                 acceleration.prepareInstanceData(device, transforms);
             }
 
-            // Update window title with stats every frame
-            glm::vec3 pos = camera.getPosition();
-            char title[256];
-            uint32_t totalSamples = accumulationFrames * 8;  // 8 SPP per frame
-            snprintf(title, sizeof(title),
-                    "IZTAPALAPA PATH TRACER | FPS: %.0f | %.2fms | %u samples | Pos: (%.1f, %.1f, %.1f)",
-                    currentFPS, frameTimeMs, totalSamples, pos.x, pos.y, pos.z);
-            glfwSetWindowTitle(window, title);
+            // Update window title with stats every 0.25s
+            titleUpdateTimer += deltaTime;
+            if (titleUpdateTimer >= 0.25f) {
+                glm::vec3 pos = camera.getPosition();
+                char title[256];
+                uint32_t totalSamples = accumulationFrames * 8;  // 8 SPP per frame
+                snprintf(title, sizeof(title),
+                        "IZTAPALAPA PATH TRACER | FPS: %.0f | %.2fms | %u samples | Pos: (%.1f, %.1f, %.1f)",
+                        currentFPS, frameTimeMs, totalSamples, pos.x, pos.y, pos.z);
+                glfwSetWindowTitle(window, title);
+                titleUpdateTimer = 0.0f;
+            }
 
 #if ENABLE_RENDER_LOOP_LOGGING
             // Print detailed status to console periodically