From owner-cvs-all  Sat May  5 17:40:50 2001
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Date: Sat, 5 May 2001 17:40:40 -0700
From: Kris Kennaway <kris@obsecurity.org>
To: John Polstra <jdp@FreeBSD.org>
Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/libexec/rtld-elf rtld.c rtld.h src/libexec/rtld-elf/alpha reloc.c src/libexec/rtld-elf/i386 reloc.c
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On Sat, May 05, 2001 at 04:21:05PM -0700, John Polstra wrote:
> jdp         2001/05/05 16:21:05 PDT
>=20
>   Modified files:
>     libexec/rtld-elf     rtld.c rtld.h=20
>     libexec/rtld-elf/alpha reloc.c=20
>     libexec/rtld-elf/i386 reloc.c=20
>   Log:
>   Performance improvements for the ELF dynamic linker.  These
>   particularly help programs which load many shared libraries with
>   a lot of relocations.  Large C++ programs such as are found in KDE
>   are a prime example.
>  =20
>   While relocating a shared object, maintain a vector of symbols
>   which have already been looked up, directly indexed by symbol
>   number.  Typically, symbols which are referenced by a relocation
>   entry are referenced by many of them.  This is the same optimization
>   I made to the a.out dynamic linker in 1995 (rtld.c revision 1.30).
>  =20
>   Also, compare the first character of a sought-after symbol with its
>   symbol table entry before calling strcmp().
>  =20
>   On a PII/400 these changes reduce the start-up time of a typical
>   KDE program from 833 msec (elapsed) to 370 msec.

Hey, nice work!

Kris

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