[C++-sig] Loading Boost.Python made bindings is horribly slow?

[Niall Douglas]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 2 Apr 2004 at 13:10, Stefan Seefeld wrote:

> > (Here's a thought - GCC outputs far too many symbols into the public
> > ELF table - if GCC had a dllexport/dllimport mechanism like on
> > Windows, the amount of symbols needing to be linked could be reduced
> > very significantly indeed. As it so happens, someone submitted a 
> 
> The simplest thing to do (in this particular context) is to put 
> everything into an anonymous namespace. Everything but the actual
> python module init function ('BOOST_PYTHON_MODULE()'). That should
> restrict the number of the exposed symbols to a strict minimum.

No, most of the symbols come from instantiations of items from the 
BPL headers and these exist inside the boost::python namespace. The 
number of symbols generated by the class wrappers (the only thing you 
can put inside an anonymous namespace as the Export_XXX function must 
remain linkable) is no more than 5% at most I'd guess.

If you take a dump using elfdump (I think), you'll see what I mean.

Cheers,
Niall





-----BEGIN PGP SIGNATURE-----
Version: idw's PGP-Frontend 4.9.6.1 / 9-2003 + PGP 8.0.2

iQA/AwUBQG26DsEcvDLFGKbPEQJHhACfXmMPexBHp6ZoFWNCti7jlYwAuTUAoPsl
r0uwQen+29jbn10GKl+dltc7
=zmWC
-----END PGP SIGNATURE-----