diff --git a/.gitignore b/.gitignore
index 7e5c4ca..c1d362c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,7 @@ cmake-build-release/
 demo/COCO_val2017
 demo/BDD100K_val
 /.vs
+cmake-build-minsizerel/*
+scripts/COCO_val2017/*
+scripts/COCO_val2017.zip
+scripts/all_labels.txt
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f478cab..579a8bc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14 -fPIC -Wno-deprecated-declara
 endif()
 if(WIN32)
 set(CMAKE_CXX_STANDARD 14)
-set(CMAKE_CXX_FLAGS "/O2 /FS ")
+set(CMAKE_CXX_FLAGS "/O1 /FS")
 set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
 endif(WIN32)
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include/tkDNN)
diff --git a/include/tkDNN/utils.h b/include/tkDNN/utils.h
index edc770e..ce4a617 100644
--- a/include/tkDNN/utils.h
+++ b/include/tkDNN/utils.h
@@ -60,7 +60,7 @@
 #define TKDNN_TSTART auto start = std::chrono::high_resolution_clock::now();
 #define TKDNN_TSTOP auto stop = std::chrono::high_resolution_clock::now(); \
 std::chrono::duration<double> duration = stop -start;                      \
-auto time_ms = std::chrono::duration_cast<std::chrono::microseconds>(duration);\
+auto time_ms = std::chrono::duration_cast<std::chrono::milliseconds>(duration);\
 double t_ns = time_ms.count();
 #endif