diff --git a/sf-buffer/src/sf_replay.cpp b/sf-buffer/src/sf_replay.cpp
index 2781a76..013c937 100644
--- a/sf-buffer/src/sf_replay.cpp
+++ b/sf-buffer/src/sf_replay.cpp
@@ -117,12 +117,20 @@ void sf_replay (
              file_index_offset < FILE_MOD;
              file_index_offset += REPLAY_BLOCK_SIZE)
         {
+            auto start_time = chrono::steady_clock::now();
+
             load_data_from_file(
                     metadata_buffer.get(),
                     (char*)(image_buffer.get()),
                     filename,
                     file_index_offset);
 
+            auto end_time = chrono::steady_clock::now();
+            auto ms_duration = chrono::duration_cast<chrono::milliseconds>(
+                    end_time-start_time).count();
+
+            cout << "read_ms " << ms_duration << endl;
+
             for (size_t i_frame=0; i_frame < REPLAY_BLOCK_SIZE; i_frame++) {
 
                 ModuleFrame module_frame = {
diff --git a/sf-buffer/src/sf_writer.cpp b/sf-buffer/src/sf_writer.cpp
index 686a640..749446d 100644
--- a/sf-buffer/src/sf_writer.cpp
+++ b/sf-buffer/src/sf_writer.cpp
@@ -199,7 +199,8 @@ int main (int argc, char *argv[])
 
         // TODO: Some poor statistics.
 
-        auto ms_duration = chrono::duration_cast<chrono::milliseconds>(end_time-start_time).count();
+        auto ms_duration = chrono::duration_cast<chrono::milliseconds>(
+                end_time-start_time).count();
         total_ms += ms_duration;
         if (ms_duration > max_ms) {
             max_ms = ms_duration;