Re: [boost] [serialization] exception-safety of container-serialization

From: David Abrahams (dave_at_[hidden])
Date: 2006-02-17 21:48:02

Thorsten Ottosen <tottosen_at_[hidden]> writes:

> David Abrahams wrote:
>> Doug Gregor <dgregor_at_[hidden]> writes:
>> 
>
>>>I think the basic guarantee is enough here. Truly paranoid users can 
>>>copy+swap themselves, but for most purposes you are better off not 
>>>having two copies of the container in memory. Most people need better 
>>>performance more than they need the strong guarantee.
>> 
>> 
>> That's one right way to look at it.  
>
> Ok, so if efficiency really matters here, would it not
> be best not to call clear(), but try to assign to the
> existing elements or create them in-place in the container?

Yes, if efficiency really matters, and the container isn't empty, and
no other considerations contravene this, it would be better.  However,
I think most of the time the container starts out empty anyway, and
there would only be savings in edge cases.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com