Re: [boost] Re: Technical session at the October C++ meeting?

From: John Max Skaller (skaller_at_[hidden])
Date: 2001-08-20 20:54:41

Peter Dimov wrote:

> the unnecessary initialization in this case is rarely a measurable problem.

        Matrix r; // initialised ..
        ..
        r = x * y;

is an O(n) + O(n^3) operation. The O(n) is irrelevant for large n.
But not in the common case n=2, where it represents 20% of overall time.
For addition, its 50%.

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