[LLVMdev] Deduplication of memory allocation

[François Fayard]

Of course, the allocation only occurs only once in every loop in the first example, inside the f function. We have 2 copy elision happening: one when the function returns and one when w is copy constructed. But we still have one memory allocation inside f.

With reference semantics, we don’t have a single memory allocation in the i-loop.

> On 01 May 2015, at 17:48, Daniel Berlin <dberlin at dberlin.org> wrote:
> Why?
> Look up "Return value optimization".
> :)

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