Index: CMakeLists.txt
===================================================================
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,7 +21,7 @@ if (UNIX OR MINGW)
     if (CMAKE_BUILD_TYPE MATCHES Debug)
         add_definitions(-std=gnu++0x -O0)
     else()
-        add_definitions(-std=gnu++0x -O3)
+        add_definitions(-std=gnu++0x)
     endif()
 endif()
 
