From owner-cvs-all  Sat May  5 16:21:12 2001
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From: John Polstra <jdp@FreeBSD.org>
Date: Sat, 5 May 2001 16:21:05 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: 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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jdp         2001/05/05 16:21:05 PDT

  Modified files:
    libexec/rtld-elf     rtld.c rtld.h 
    libexec/rtld-elf/alpha reloc.c 
    libexec/rtld-elf/i386 reloc.c 
  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.
  
  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).
  
  Also, compare the first character of a sought-after symbol with its
  symbol table entry before calling strcmp().
  
  On a PII/400 these changes reduce the start-up time of a typical
  KDE program from 833 msec (elapsed) to 370 msec.
  
  MFC after:	5 days
  
  Revision  Changes    Path
  1.52      +22 -6     src/libexec/rtld-elf/rtld.c
  1.22      +11 -2     src/libexec/rtld-elf/rtld.h
  1.12      +12 -5     src/libexec/rtld-elf/alpha/reloc.c
  1.7       +10 -5     src/libexec/rtld-elf/i386/reloc.c


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