Lambda VS Function [duplicate]

Answer 1

I think lambda is elegant when using stl functions like , or you want quick throw away functions without naming them .

sort(v.begin(),
     v.end(),
     [](int a, int b){ return a > b; }
);

but it's not faster from the function .

Disassembly of both .

    helloWorld1();
008112A0  mov         ecx,dword ptr ds:[813054h]  
008112A6  push        8119A0h  
008112AB  call        std::operator<< > (0811780h)  
008112B0  mov         ecx,eax  
008112B2  call        dword ptr ds:[813038h]  
    helloWorld2();
008112B8  mov         ecx,dword ptr ds:[813054h]  
008112BE  push        8119A0h  
008112C3  call        std::operator<< > (0811780h)  
008112C8  mov         ecx,eax  
008112CA  call        dword ptr ds:[813038h] 

both have the same disassembly.