Hidden Costs of Memory Allocation

It’s important to understand the cost of memory allocations, but this cost can be surprisingly tricky to measure. It seems reasonable to measure this cost by wrapping calls to new[] and delete[] with timers. However, for large buffers these timers may miss over 99% of the true cost of these operations, and these hidden costs are larger than I had expected.

more here...........http://randomascii.wordpress.com/2014/12/10/hidden-costs-of-memory-allocation/