An area of memory that is used for dynamic memory allocation.
一块被用作动态内存分配的内存区域。
2
If the amount of free space available in the small object area is much greater than the size of the allocation request and yet the request can not be satisfied, the heap is fragmented.
如果小对象区域中的可用自由空间量远远大于分配请求大小，但是还无法满足请求，则表明堆中都是碎片。
3
The VTMemory class represents an area of memory where the allocation mechanism can use any algorithm and hence can vary in time.