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From: Peter Dimov (pdimov_at_[hidden])
Date: 2004-07-11 06:55:16

John Maddock wrote:


> template <class T>
> void fill_n(T* data, int len, call_traits<T>::call_type val)
> {
> while(len)
> {
> data[len--] == val; // if val is a reference it gets re-loaded every
> time rather than cached in a register
> }
> }

fill_n should just take val by value. There are "len" assignments in the
loop; the additional cost of one copy is insignificant. No point on relying
on heuristics here.

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