[boost] Re: call_traits

From: Pavel Vozenilek (pavel_vozenilek_at_[hidden])
Date: 2004-07-06 13:56:28

"Howard Hinnant" wrote:

> > So are you saying that call_traits is *not* useful for said
> > optimization?  If so, why not?
>
> For it to make a significant difference in performance, say for passing
> a parameter, the function would have to be very short - short enough
> that it should be inlined.
>
...
> On Metrowerks Pro 9.2 / Mac I've just run the following experiment:
>
>
> I've looked at the generated (optimized) assembly of main, using both
> foo1 and foo2.  The assembly is identical in both cases.  No doubt I
> could come up with examples where the assembly is different.
>
More complex programs may not inline the function and difference
will show up.

Experimental version of STLport with call_traits like optimisation
got ~5% speedup for vector<int>::push_back().

/Pavel