title: When HeapCreate function is used or in what cases do you need a number of heaps?
body: <p>Windows API has a set of function for heap creation and handling: HeapCreate, HeapAlloc, HeapDestroy and etc.
  I wonder what is the use for another heap in a program? 
  From fragmentation point of view, you will get external fragmentation where memory is not reused among heaps. So even if low-fragmentation heaps are used, stil there is a fragmentation.
  Memory management of additional heaps seems to be low-level. So they are not easy to use.
  In addition, additional heap can probably be emulated using allocations from heap and managing allocated memory. </p>
  
  <p>So what is the usage? Did you use it?</p>