[cfe-dev] Binary size when using std::function with lambda expression

[Cyril Makloufi via cfe-dev]

Hello,


When using std::function instead of function pointer (see the sample of code) on Mac, we get a huge difference between size of generated binary (80ko when using function pointer and 157ko whit std::function).

I use Xcode to build debug with -O0 -std=gnu++14 and libc++.

It doesn't seem to have the same result on windows or linux.

Is it something normal ?


Here's the code sample :


#include <iostream>

#include <functional>



int main(int argc, const char * argv[]) {

    std::function<void()> f = [](){std::cout << "LOG2\n";};

//    void (*f)() = [](){std::cout << "LOG3\n";};



    f();



    return 0;

}



Thanks,

Cyril

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Cyril Makloufi
Développeur
Email : Cyril.Makloufi at 4d.com<mailto:Cyril.Makloufi at 4d.com>
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