Add timer.h for benchmarking

src/common/timer.h

@@ -0,0 +1,33 @@
+#ifndef ADVENTOFCODE2025_TIMER_H
+#define ADVENTOFCODE2025_TIMER_H
+
+#include <chrono>
+#include <iostream>
+
+class Timer {
+public:
+    Timer() {
+        running = true;
+        start = std::chrono::high_resolution_clock::now();
+    }
+
+    void stop() {
+        end = std::chrono::high_resolution_clock::now();
+        running = false;
+    };
+
+    void print () {
+        if (running) { stop(); };
+        const auto seconds = std::chrono::duration_cast<std::chrono::seconds>(end - start);
+        const auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(end - start);
+        const auto us = std::chrono::duration_cast<std::chrono::microseconds>(end - start);
+        std::cout << "Execution time: \n\t" << seconds.count() << " s\n\t" << ms.count() << " ms\n\t" << us.count() << " us" << std::endl;
+    }
+
+private:
+    bool running = false;
+    std::chrono::time_point<std::chrono::system_clock> start;
+    std::chrono::time_point<std::chrono::system_clock> end;
+};
+
+#endif //ADVENTOFCODE2025_TIMER_H

src/day1/p1/main.cpp

@@ -63,6 +63,7 @@
 #include <string>
 #include <fstream>
 #include <memory>
+#include "timer.h"
 
 bool get_dir(const std::string& line) {
     if (line.find('R') != std::string::npos) {
@@ -96,6 +97,8 @@ int rotate (const int state, const bool direction, const int number) {
 }
 
 int main() {
+    Timer timer;
+
     std::ifstream stream("input/day1/p1.txt");
     std::string line;
     int state = 50;
@@ -108,7 +111,11 @@ int main() {
         }
     }
 
+    timer.stop();
+
     std::cout << "Password: " << password << std::endl;
 
+    timer.print();
+
     return 0;
 }

src/day1/p2/main.cpp

@@ -95,8 +95,8 @@
 #include <iostream>
 #include <string>
 #include <fstream>
-#include <vector>
-
+#include <chrono>
+#include "timer.h"
 
 bool get_dir(const std::string& line) {
     if (line.find('R') != std::string::npos) {
@@ -140,6 +140,8 @@ int get_number(const std::string& line) {
 }
 
 int main() {
+    Timer timer;
+
     std::ifstream stream("input/day1/p1.txt");
     std::string line;
     int state = 50;
@@ -151,7 +153,11 @@ int main() {
         password = std::get<1>(temp);
     }
 
+    timer.stop();
+
     std::cout << "Password: " << password << std::endl;
 
+    timer.print();
+
     return 0;
 }