Question

I read this article which is about Managing heap memory written by Randy Kath.
I would ask about this segment:

Every process in Windows has one heap called the default heap.
Processes can also have as many other dynamic heaps as they wish,
simply by creating and destroying them on the fly. The system uses the
default heap for all global and local memory management functions, and
the C run-time library uses the default heap for supporting malloc
functions.

I did not underestand what is the function or benefit of the default heap?

Also, I have another question, the author referred always to reserved and committed space, what is meant by committed space?

Answer 1

Applications need heaps to allocate dynamic memory. Windows automatically creates one heap for each process. This is the default heap. Most apps just use this single default heap.

Committing is the act of assigning reserved virtual addresses to specific memory so that it is available for use by the process. I suggest you read this article on MSDN: Managing Virtual Memory.