Features like generic dispatch in Common Lisp result in similar amounts of dynamism; methods and classes can be defined and redefined at any time so a lot of wo

Features like generic dispatch in Common Lisp result in similar amounts of dynamism; methods and classes can be defined and redefined at any time so a lot of work goes into making that fast; see for example http://metamodular.com/generic-dispatch.pdf http://metamodular.com/generic-dispatch.pdf Also similar to Kernel#set_trace_func, CL has TRACE (http://www.lispworks.com/documentation/lw61/CLHS/Body/m_tracec.htm http://www.lispworks.com/documentation/lw61/CLHS/Body/m_trac...) but unlike generic dispatch, that's not expected to be fast.