Although Doug'll probably pipe up saying in modern compilers/computers,
function call overhead time is negligible, etc.

I /have/ had a situation where the overhead made a difference though, in a very low-level, high-traffic function.

I was optimizing an indexing process recently, and had a low-level function that was called ~34 million times in a 50-second test run. If I recall correctly, changing the function to a macro gave me a ~1% time savings.

But that's more a matter of "negligible * infinite = noticeable". :)


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Tim Margheim
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