diff --git a/rotation.cpp b/rotation.cpp
index 6a81a0a..f17cce6 100644
--- a/rotation.cpp
+++ b/rotation.cpp
@@ -1,6 +1,7 @@
 #include <string>
 #include <fstream>
 #include <iostream>
+#include <iomanip>
 #include <sstream>
 #include <cmath>
 #include <cassert>
@@ -1024,30 +1025,45 @@ int main(int argc, char* argv[])
   Image img(argv[1]);
   TiledImage<8, 8> tiled_img(argv[1]);
 
+  // No tile
+  float average = 0.0;
+  int i = 0;
   for (double rotation = 0; rotation < 360; rotation += 45)
   {
-    // No tile
     auto const before = chrono::high_resolution_clock::now();
     Image* const rotated = rotate(img, rotation);
     auto const after = chrono::high_resolution_clock::now();
     auto const duration_ms = std::chrono::duration_cast<std::chrono::milliseconds>(after - before);
-
-    // Tile
-    auto const before_tiled = chrono::high_resolution_clock::now();
-    auto const rotated_tiled = rotate(tiled_img, rotation);
-    auto const after_tiled = chrono::high_resolution_clock::now();
-    auto const duration_ms_tiled = std::chrono::duration_cast<std::chrono::milliseconds>(after_tiled - before_tiled);
+    average += duration_ms.count();
 
     cout << "rotate(" << rotation << "): " << duration_ms.count() << " ms" << endl;
-    cout << "tiled: " << duration_ms_tiled.count() << " ms" << endl;
-    cout << "speedup: " << (int) (((float) duration_ms.count() / duration_ms_tiled.count() - 1) * 100) << "%" << endl << endl;
 
     rotated->save(get_save_path("rotated", rotation));
-    rotated_tiled->save(get_save_path("rotated_tiled", rotation));
-
     delete rotated;
-    delete rotated_tiled;
+    ++i;
   }
+  cout << "---------" << endl;
+  cout << " average: " << average / i << "ms" << endl << endl;
+
+  // Tile
+  average = 0.0;
+  i = 0;
+  for (double rotation = 0; rotation < 360; rotation += 45)
+  {
+    auto const before = chrono::high_resolution_clock::now();
+    auto const rotated = rotate(tiled_img, rotation);
+    auto const after = chrono::high_resolution_clock::now();
+    auto const duration_ms = std::chrono::duration_cast<std::chrono::milliseconds>(after - before);
+    average += duration_ms.count();
+
+    cout << "rotate tiled(" << rotation << "): " << duration_ms.count() << " ms" << endl;
+
+    rotated->save(get_save_path("rotated_tiled", rotation));
+    delete rotated;
+    ++i;
+  }
+  cout << "---------" << endl;
+  cout << " average: " << average / i << "ms" << endl;
 
   return 0;
 }