c++ - Initialization List Vs Static Const Initializing -

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what faster when creating 100+ newobjs:

//initialization list     struct struct_obj {     ...tonsofvars     struct_obj() : tonsofvars(init) {}     }

or:

//static const constructed, call copy constructor(?) static const struct_obj defaultstruct_obj = { tonsofvars(init) }; struct_obj newobj = defaultstruct_obj

tonsofvars imply multiple different variables (from pod structs/classes)

i assume static const, since calling copy constructor (meaning 1 op?) vs calling each initializer in initalization list?
although common response "profile it", doing not give me explanation why faster.

it depends on types in tonsofvars.

i assume static const, since calling copy constructor (meaning 1 op?) vs calling each initializer in initalization list?

it calling 1 copy constructor struct_obj, still needs call copy constructor each field.

if pod data, there no difference @ all. however, in types default constructors may faster (or slower) copy constructors, make difference.


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