diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4e7e699..d25623c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -101,6 +101,17 @@ if (ENABLE_GOMA)
   set_compiler_launcher(ENABLE_GOMA gomacc)
 endif ()
 
+if(ENABLE_EXTRA_SPEED)
+	if(MSVC)
+		#enable parallel builds
+		add_compile_options("$<$<CXX_COMPILER_ID:MSVC>:/Qpar>")
+		#maximum optimization in Release mode
+		add_compile_options("$<$<AND:$<CXX_COMPILER_ID:MSVC>,$<CONFIG:RELEASE>>:/Ox>")
+	else()
+		add_compiler_flag_if_supported("-O3")
+	endif()
+endif()
+
 # Generate a version file containing repository info.
 include(FindGit)
 find_package(Git)