Re: [boost] move semantics

From: Howard Hinnant (hinnant_at_[hidden])
Date: 2002-02-05 19:09:51

On Tuesday, February 5, 2002, at 06:49  PM, Rainer Deyke wrote:

>> Yes, these will all work.  And they are all less efficient than
> moving
>> elements out of the way once (directly to where they belong),
> leaving
>> valid elements in their place and copying x directly into place.
>
> While this is technically true, they are also all potentially orders
> of magnitude faster than the naive copying approach.  They are close
> enough to optimal that I am not sure if further optimization is worth
> it.

They are not close to optimal at all if T is a light weight class with 
move semantics (like auto_ptr).  In this case your alternatives are 2 
and 3 times slower.

-Howard