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Re: RFC: Speeding up libstdc++.so with --dynamic-list-data
H. J. Lu writes:
> On Tue, Jan 09, 2007 at 01:38:00PM +0000, Andrew Haley wrote:
> > H. J. Lu writes:
> > > I am enclosing a patch to implement a new linker swicth,
> > > --dynamic-list-data. It is -Bsymbolic for function symbols only.
> > > I tried it with C, C++, Java and Fortran on Linux/ia32, Linux/x86-64
> > > and Linux/ia64. There are only a few regressions. The function calls
> > > within the new resulting DSOs will bind locally. It speeds up
> > > the enclosed C++ testcase by
> > >
> > > 1. 23% on ia64.
> > > 2. 6% on ia32.
> > > 3. 3% on x86-64.
> > >
> > > Should we consider such optimization?
> >
> > That's a terrible name for the option. What does it mean?
>
> It is an extension of the current command line options:
>
> --dynamic-list-cpp-typeinfo Use C++ typeinfo dynamic list
> --dynamic-list FILE Read dynamic list
But you said it was like -Bsymbolic for function symbols only. What
is the connection between C++ typeinfo and that? (Hint: Java doesn't
use C++ typeinfo, but -Bsymbolic for function symbols only would be
very useful.)
Andrew.