dynamic library cost (was RE: libtool, java woes)

Tue Apr 10 14:43:00 GMT 2001

> > From: Alexandre Oliva [ mailto:aoliva@redhat.com ]
> >
> > We either need libsupc++ to be a shared library, that both libstdc++
> > and libgcj depend on, or have libgcj depend on libstdc++.
> > 
> One thing to keep in mind with all of this:
>> I'm seeing significant overheads as a result of dynamic library calls. On a
> PII/300 machine, a (single-threaded) loop containing only free(malloc(8))
> runs more than 20% faster when it's linked statically. This is similar on
> an Itanium machine. I'm not sure how significant that is for typical C
> programs, nor how frequently something like libsupc++ is called. I believe
> it is currently very significant for libgcj and calls to the garbage
> collector library from libgcj.

Well, we could also say that on AIX, libsupc++.so is a symlink to
libstdc++.so .