Handling a Common strcmp

Handling a Common strcmp - Handling a Common strcmp Case In...

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Handling a Common strcmp() Case In this section of the newsletter we will present some practical performance tips for improving code speed and reducing memory usage. Some of these tips will be useful only for C++ code and some will be more general and applicable to C or other languages. As a first example, consider an application using C-style strings and functions such as strcmp(). A recent experience with this sort of application involved a function that does word stemming, that is, takes words such as "motoring" and reduces them to their root stem, in this case "motor". In profiling this function, it was observed that much of the overall time was being spent in the strcmp() function. For the C++ compiler in question (Borland 3.1), this function is written in assembly language and is quite fast, and attempts to speed it up by unrolling the equivalent code locally at the point of function call will typically result in slowing things down.
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