Using vector as a buffer without initializing it on resize()

Question

I want to use vector as a buffer. The interface is perfect for my needs, but there\'s a performance penalty when resizing it beyond its current size

Answer 1

Encapsulate it.

Initialise it to the maximum size (not reserve).

Keep a reference to the iterator representing the end of the real size, as you put it.

Use begin and real end, instead of end, for your algorithms.