Returning by reference faster than returning by reference

[Nava Whiteford]

Hi,

I understand that in some cases returning by reference may be faster than
returning by value. However I'm wondering how often the temporary value
can be optimised out?

I made a simple example which seems to show very little difference in
the simple case:

http://linuxjunk.blogspot.com/2009/12/returning-by-reference-faster-than.html

Is there something I've missed in my test? i686-apple-darwin10-g++-4.2.1 was used.

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