[Boost-users] boost serialisation number of global symbols per serializable type

How can I work out the number of global symbols introduced per serializable type ? Is this fixed or does it vary according to type of serialisation , i.e by ptr, versus by value ? On linux I tried: nm test | grep GLOBAL | grep RepeatDay | wc Which revealed about 26, however this does not seem right ? Is there any way to reduce this overhead? Any help appreciated. Best regards, Ta, Avi