Weird behaviour of C++ destructors

Question

#include 
#include 
using namespace std;

int main()
{
    vector< vector > dp(50000, vector(4, -1));
    c         


        

Answer 1

It's definitely HeapFree that's slowing this down, you can get the same effect with the program below.

Passing parameters like HEAP_NO_SERIALIZE to HeapFree doesn't help either.

#include "stdafx.h"
#include 
#include 

using namespace std;


int _tmain(int argc, _TCHAR* argv[])
{
HANDLE heap = HeapCreate(0, 0, 0);

void** pointers = new void*[50000];

int i = 0;
for (i = 0; i < 50000; ++i)
{
    pointers[i] = HeapAlloc(heap, 0, 4 * sizeof(int));
}

cout << i;
for (i = 49999; i >= 0; --i)
{
    HeapFree(heap, 0, pointers[i]);
}

cout << "!";

delete [] pointers;

HeapDestroy(heap);
}