Tests: add performance tests

cpp/test/collision_performance.cpp

@@ -0,0 +1,106 @@
+#include <gtest/gtest.h>
+#include <chrono>
+#include <iostream>
+#include <iomanip>
+
+// TODO: Add necessary includes for collision testing
+// #include "collision_shapes.hpp"
+// #include "entities.hpp"
+
+/**
+ * @file collision_performance.cpp
+ * @brief Performance tests for collision detection systems
+ * 
+ * This file contains performance benchmarks and tests for various
+ * collision detection algorithms and optimizations.
+ */
+
+/**
+ * @brief Helper class to measure and print execution time
+ */
+class PerformanceTimer {
+public:
+    using Clock = std::chrono::high_resolution_clock;
+    using TimePoint = std::chrono::time_point<Clock>;
+    using Duration = std::chrono::duration<double, std::milli>;
+    
+    PerformanceTimer(const std::string& name) : name_(name) {
+        start_ = Clock::now();
+    }
+    
+    ~PerformanceTimer() {
+        auto end = Clock::now();
+        Duration duration = end - start_;
+        std::cout << std::fixed << std::setprecision(3)
+                  << "[PERF] " << name_ << ": " 
+                  << duration.count() << " ms" << std::endl;
+    }
+    
+    double elapsed_ms() const {
+        auto end = Clock::now();
+        Duration duration = end - start_;
+        return duration.count();
+    }
+    
+private:
+    std::string name_;
+    TimePoint start_;
+};
+
+/**
+ * @brief Run a function multiple times and measure average execution time
+ * @param name Name of the test for output
+ * @param iterations Number of iterations to run
+ * @param func Function to benchmark
+ */
+template<typename Func>
+void benchmark_function(const std::string& name, int iterations, Func func) {
+    auto start = PerformanceTimer::Clock::now();
+    
+    for (int i = 0; i < iterations; ++i) {
+        func();
+    }
+    
+    auto end = PerformanceTimer::Clock::now();
+    PerformanceTimer::Duration total_duration = end - start;
+    double avg_duration = total_duration.count() / iterations;
+    
+    std::cout << std::fixed << std::setprecision(6)
+              << "[BENCHMARK] " << name << ":\n"
+              << "  Total: " << total_duration.count() << " ms\n"
+              << "  Iterations: " << iterations << "\n"
+              << "  Average: " << avg_duration << " ms\n"
+              << "  Throughput: " << (iterations / (total_duration.count() / 1000.0))
+              << " ops/sec" << std::endl;
+}
+
+// Example test function 1
+void test_function_1() {
+    // TODO: Implement actual collision test
+    volatile int sum = 0;
+    for (int i = 0; i < 1000; ++i) {
+        sum += i;
+    }
+}
+
+// Example test function 2
+void test_function_2() {
+    // TODO: Implement actual collision test
+    volatile int product = 1;
+    for (int i = 1; i < 100; ++i) {
+        product *= (i % 10 + 1);
+    }
+}
+
+TEST(CollisionPerformance, CompareAlgorithms) {
+    std::cout << "\n=== Collision Performance Comparison ===\n" << std::endl;
+    
+    const int iterations = 10000;
+    
+    benchmark_function("Algorithm 1 (test_function_1)", iterations, test_function_1);
+    benchmark_function("Algorithm 2 (test_function_2)", iterations, test_function_2);
+    
+    std::cout << "\n======================================\n" << std::endl;
+    
+    SUCCEED();
+}