[radicalbyte]

If you write C/C++ then you probably need fast code. Function calls - unless inlined - have a small cost. The cost is really rather small (think memory writes) and can be negligible depending on where the values are stored.

That is of course rarely the reason. From what I've experienced it's usually that the developer is uncomfortable with abstraction (at least that was my reason many moons ago).

[joshka]

If speed of algorithm / function is a concern on particular functions, write a test that measures this. Refactor as much as you like until you hit the limit of readability vs adequate speed.