From: Beman Dawes (bdawes_at_[hidden])
Date: 2003-05-08 09:04:21
At 07:28 PM 5/7/2003, Darren Cook wrote:
>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