Orchid Win7 v1 <voi### [at] devnull> wrote:
> On 14/05/2013 06:04 PM, Warp wrote:
> > When using the standard containers, one should know how they work and
> > what they are doing, in terms of efficiency. For example, passing them
> > by value eg. as function parameters is inefficient, and that should always
> > be done by reference, if possible.

> How about std::string? Presumably it's a bad idea to pass that by value 
> either...

It depends on the implementation.

Since std::string is so ubiquitous, many standard library implementations
have optimizations that make copying them fast (some use short string
optimization, some use lazy copying...), but that's in no way a guarantee.

There's usually no reason to not to use a std::string reference if it
suffices. Only copy when you have to.

-- 
                                                          - Warp

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