memcmp vs wmemcmp

#include <cstring>
#include <iostream>
#include <ctime>

using namespace std;

int
glibc_wmemcmp (const wchar_t *s1, const wchar_t *s2, size_t n)
{
  wchar_t c1;
  wchar_t c2;

  while (n >= 4)
    {
      c1 = s1[0];
      c2 = s2[0];
      if (c1 - c2 != 0)
    return c1 > c2 ? 1 : -1;
      c1 = s1[1];
      c2 = s2[1];
      if (c1 - c2 != 0)
    return c1 > c2 ? 1 : -1;
      c1 = s1[2];
      c2 = s2[2];
      if (c1 - c2 != 0)
    return c1 > c2 ? 1 : -1;
      c1 = s1[3];
      c2 = s2[3];
      if (c1 - c2 != 0)
    return c1 > c2 ? 1 : -1;
      s1 += 4;
      s2 += 4;
      n -= 4;
    }

  if (n > 0)
    {
      c1 = s1[0];
      c2 = s2[0];
      if (c1 - c2 != 0)
    return c1 > c2 ? 1 : -1;
      ++s1;
      ++s2;
      --n;
    }
  if (n > 0)
    {
      c1 = s1[0];
      c2 = s2[0];
      if (c1 - c2 != 0)
    return c1 > c2 ? 1 : -1;
      ++s1;
      ++s2;
      --n;
    }
  if (n > 0)
    {
      c1 = s1[0];
      c2 = s2[0];
      if (c1 - c2 != 0)
    return c1 > c2 ? 1 : -1;
    }

  return 0;
}

int main(int argc, char ** argv) {
    const wchar_t my_wchar11[] = L"rstuw12345612345ab89abcefghijklmnopqrstuw123457q";
    const wchar_t my_wchar22[] = L"rstuw12345612345ab89abcefghijklmnopqrstuw123457q";

    const char my_char11[] = "rstuw12345612345ab89abcefghijklmnopqrstuw123457q";
    const char my_char22[] = "rstuw12345612345ab89abcefghijklmnopqrstuw123457q";

//----------------------------------------------------------------------------------------

    const size_t num = 99999999;
    int clock1;
    int clock2;

    //------------------------------------------------------Сравнение через wmemcmp:-----------------------

    int status_wmemcmp = 0;
    const int wlen = wcslen(my_wchar22);
    clock1 = clock();
    for (size_t i = 0; i < num; i++)
    {
        const int pos = i % wlen;
        status_wmemcmp += wmemcmp(my_wchar11 + pos, my_wchar22 + pos, wlen - pos);
    }
    clock2 = clock();

    cout << "time_wmemcmp:" << clock2 - clock1 << endl;
    cout << "status_wmemcmp:" << status_wmemcmp << endl;

    //------------------------------------------------------------------------------------------------

    cout << endl;

    //------------------------------------------------------Сравнение через memcmp:----------------------

    const int len = strlen(my_char22);
    int status_memcmp = 0;
    clock1 = clock();
    for (size_t i = 0; i < num; i++)
    {
        const int pos = i % len;
        status_memcmp += memcmp(my_char11 + pos, my_char22 + pos, len - pos);
    }
    clock2 = clock();

    cout << "time_memcmp:" << clock2 - clock1 << endl;
    cout << "status_memcmp:" << status_memcmp << endl;
    //------------------------------------------------------------------------------------------------------

    cout << endl;

    //------------------------------------------------------Сравнение через GLIBC wmemcmp:-----------------------

    int status_glibc_wmemcmp = 0;
    clock1 = clock();
    for (size_t i = 0; i < num; i++)
    {
        const int pos = i % wlen;
        status_glibc_wmemcmp += glibc_wmemcmp(my_wchar11 + pos, my_wchar22 + pos, wlen - pos);
    }
    clock2 = clock();

    cout << "time_glibc_wmemcmp:" << clock2 - clock1 << endl;
    cout << "status_glibc_wmemcmp:" << status_glibc_wmemcmp << endl;

    //------------------------------------------------------------------------------------------------
}