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Re: Prelinking of shared libraries

To: Andreas Schwab <schwab at suse dot de>
Subject: Re: Prelinking of shared libraries
From: Waldo Bastian <bastian at kde dot org>
Date: Wed, 9 May 2001 17:52:48 -0700
Cc: libc-alpha at sources dot redhat dot com
References: <hoae4tvafc.fsf@gee.suse.de> <200105072258.f47Mwxs24720@adsl-64-164-37-1.dsl.scrm01.pacbell.net> <jezocpzdyf.fsf@hawking.suse.de>

I have updated my paper with, among other things, something that John Polstra 
(BSD linker) pointed out:

"
It is interesting to note that multiple R_386_32 entries can point to the 
same symbol:
 
The following table lists the number of total R_386_32 entries per library as
well as the number of unique symbols referenced.
 
Table 4d:
 
		R_386_32	Unique Symbols
libqt		17090		4377
libkdecore	1719		806
libkdeui		15547		2518
libXft		46		30
"

John managed to get quite some saving wrt link-time by caching symbol lookups 
for R_386_32 relocations. Konqueror startup went down from 0.86 to 0.40.

Cheers,
Waldo
-- 
bastian@kde.org | SuSE Labs KDE Developer | bastian@suse.com

References:
- Prelinking of shared libraries
  - From: Andreas Jaeger
- Re: Prelinking of shared libraries
  - From: Waldo Bastian
- Re: Prelinking of shared libraries
  - From: Andreas Schwab

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