Is there something wrong with realloc() in Watcom C/C++ 10.0a?

When I run the following program with parameters 2000...3000, my swapfile
starts growing like crazy (from ca. 14 MB to 23 MB even if the size of 2000
DATA items is only 360000 bytes).

Watcom's realloc() is also much slower than IBM's.

/* compile: wcl386 -zp4 test.c */
#include 
#include 
#include 

#define TEXTLEN  128
#define NAMELEN  13
#define EXTLEN   5

typedef struct _data {
  char        text [TEXTLEN];
  char        name [NAMELEN];
  char        ext  [EXTLEN];
  char        *fullname;
  BOOL        binary;
  ULONG       line;
  long        offset;
  ULONG       fattr;
  FTIME       ftime;
  FDATE       fdate;
  ULONG       fsize;
  USHORT      lboxID;
} DATA;

int main (int argc, char **argv)
{
  short  n = 0, i, loop;
  size_t size;
  DATA  *pData;

  if (argc != 2)
    return 1;

  loop = atoi (argv[1]);
  printf ("sizeof (DATA) = %d\n", sizeof (DATA));

  pData = (DATA *) malloc (sizeof (DATA) * (size_t) 65);

  for (i = 0; i < loop; i++)
  {
    n++;
    if (!(n % 64))
    {
      size = sizeof (DATA) * (size_t) (n + 65);
      pData = (DATA *) realloc (pData, size);
      printf ("i = %d, realloc (pData, %d)\n", i, size);
    }
  }

  free (pData);

  return 0;
}

        // Albert  (Team OS/2)
    email: albert{at}sci.fi
           jla{at}to.icl.fi (work)

---