#include <windows.h>
#include <stdio.h>
int main()
{
   SYSTEM_INFO sSysInfo;

   GetSystemInfo(&sSysInfo);

   DWORD dwPageSize = sSysInfo.dwPageSize;


   LPVOID lpvBase = VirtualAlloc(
      NULL,
      dwPageSize,
      MEM_RESERVE|MEM_COMMIT,
      PAGE_EXECUTE_READWRITE);
   if (lpvBase == NULL )
      printf("VirtualAlloc reserve failed.");


   BYTE *endExec = (BYTE*)lpvBase;
   memset(lpvBase,0x90,dwPageSize);
   endExec[1024] = 0xC3;

   INT64 t0 = 0;
   INT64 t1 = 0;
   _asm
   {
      rdtsc
      mov DWORD PTR [t0],eax
      mov DWORD PTR [t0+4],edx
      call endExec
      rdtsc
      mov DWORD PTR [t1],eax
      mov DWORD PTR [t1+4],edx
   }

   printf("%d",t1-t0);

}