diff --git a/common/goos/CMakeLists.txt b/common/goos/CMakeLists.txt
index 2c36a8302f..cc8c4fe041 100644
--- a/common/goos/CMakeLists.txt
+++ b/common/goos/CMakeLists.txt
@@ -1,2 +1,9 @@
+
+IF (WIN32)
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /O2")
+ELSE()
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3")
+ENDIF()
+
 add_library(goos SHARED Object.cpp TextDB.cpp Reader.cpp Interpreter.cpp InterpreterEval.cpp PrettyPrinter.cpp)
 target_link_libraries(goos common_util fmt)
\ No newline at end of file