Personally I think that looks pretty good. There's no templates, no inheritance. Not sure what would make bloat there nor latency. Whatever the faults of the syntax for folding, it's got to be better than VA_ARGS hasn't it?

There are templates: for example

    void print1(auto x){std::cout<< x;}

is a function template

    template <class T>
    void print1(T x){std::cout<< x;}

This is not valid C++14 however, so it doesn't compile. If you replace these, you'll probably still get a stack overflow while expanding the templates because there are almost 7000 arguments to a single function call.

>This is not valid C++14 however, so it doesn't compile.

It is "valid C++" IF there are fewer arguments, like 6-10

The example illustrates C++ internal representation of "variadic functions".

I was referring to the use of generic functions (ie. with an argument with type-specifier auto) which is not C++14. Your copy of g++ may accept it as an extension.

And that works if you use the old C style variadic functions?I suppose I see no reason why it wouldn't, but that isn't the same.

Have you tried to compile and run it?