The only time that recursion is actually useful is when you're branching out. If each instance of your function only calls the function once, you should be using a loop to eliminate the function overhead. Even branching functions can often be done better with stacks, since with a stack you can allocate all memory needed in advance, while a recursive function has to allocate and deallocate every time it runs through an instance of itself.
++ to everyone who posted similar messages.
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