id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	lang	patch	platform
452	Don't use MULTI when not needed	allison	cotto	"Most (perhaps all) of the current core PMCs don't really use multiple dispatch. They declare MULTIs as an expensive way of performing a simple if/else on the type of the second argument. Convert these to actual if/else or switch/case statements within a single-dispatched VTABLE entry.

Some of the converted VTABLE entries should have a default case that extracts a value from the second argument and acts on it (such as, division within a Float PMC might simply ask for the 'get_number' value of the second argument). Other converted VTABLE entries should have a default case of multiple dispatch (if the second argument isn't one of the specific anticipated types). Some converted VTABLE entries might use value extraction as a first default for core PMC types (which are relatively predictable) and multiple dispatch as the default-default to handle non-core types.

The VTABLE entries in default.pmc should still perform multiple dispatch, to allow MMD overrides from non-core types."	deprecation	closed	normal		core		medium	invalid