While faster, it is more prone to error should there be any change in requirements. It also needs a helluvalot of commenting so that your maintenance programmer(s) (which could very well be you!) don't make a well-meaning change and screw it up.

Like all optimizations, it should be done only if that section of code has been identified as a bottleneck through profiling. (Never use analysis as the only source of information when profiling. Using a profiler is the only way to truly know where your bottlenecks are.)

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We are the carpenters and bricklayers of the Information Age.

Don't go borrowing trouble. For programmers, this means Worry only about what you need to implement.

Please remember that I'm crufty and crochety. All opinions are purely mine and all code is untested, unless otherwise specified.