According to this article (http://blog.practical-scheme.net/gauche/20170422-next-method), if we avoid allocating unused
call-next-method, then we might be able to obtain 35% performance improvement.
Since we don't have much information about source code on procedure, what we can do is the following:
1. Check LREF(0) of actual implementation procedures of method
add-method or method creation to call above
3. Set flag to the method