>Well it was a real-world example and I only applied it to one of the >classes. 2-3% speed boost for only three extra lines of code (header >include, new, delete) is worth having.
A 2-3% timing difference probably isn't reliably repeatable in real code.
How code and data happens to land in hardware caches can easily swamp out such a small difference. The version-to-version or step-to-step differences in CPU's, memory, compilers, or operating systems can cause that much difference in a given program. Differences need to get up into the 20-30% range before they are likely to be reliably repeatable across different systems.
At least that's been my experience.
--Beman
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