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Re: Bash-4.0-rc1 available for FTP


From: Dan Nicolaescu
Subject: Re: Bash-4.0-rc1 available for FTP
Date: Mon, 2 Feb 2009 07:15:07 -0800 (PST)

Nicolas <address@hidden> writes:

  > Hello,
  > 
  > I ran some benchmarks of Bash 4.0-rc1. It is quite impressive! Here are the
  > results.
  > My computer is a Pentium M (running at 600 MHz for the test), running Linux
  > 2.6.26 with libc6 version 2.7 and Debian bash-completion version 20080705.
  > The figures are averages over 100 tests.
  > 
  > Bash 3.2, without bash malloc:
  >  * eval `dircolors`: 0.636s
  >  * source /etc/bash_completion: 0.721s
  > 
  > Bash 4.0, with bash malloc:
  >  * eval `dircolors`: 0.385s
  >  * source /etc/bash_completion: 41.651s (around 93% of the time is spent in
  > function find_entry of lib/malloc/table.c)
  > 
  > Bash 4.0, without bash malloc:
  >  * eval `dircolors`: 0.132s
  >  * source /etc/bash_completion: 0.703s

bash_completion is too slow because it does strange things: it parses
itself because it wants to emulate the behavior of "-o plusdirs".
See 
https://bugzilla.redhat.com/show_bug.cgi?id=479936
for a preliminary patch.




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