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parameter expansion is too slow
From: |
William Park |
Subject: |
parameter expansion is too slow |
Date: |
Sat, 4 Sep 2004 23:59:07 -0400 |
Configuration Information [Automatically generated, do not change]:
Machine: i686
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i686'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-pc-linux-gnu'
-DCONF_VENDOR='pc' -DLOCALEDIR='/usr/local/share/locale' -DPACKAGE='bash'
-DSHELL -DHAVE_CONFIG_H -I. -I. -I./include -I./lib -O4 -march=i686
uname output: Linux node1 2.6.7 #6 SMP Sun Aug 22 23:49:58 EDT 2004 i686
unknown unknown GNU/Linux
Machine Type: i686-pc-linux-gnu
Bash Version: 3.0
Patch Level: 0
Release Status: release
Description:
Parameter expansion ${xy[*]} is awefully slow.
Repeat-By:
seq 100000 > /dev/null --> 0.3s
echo `seq 100000` > /dev/null --> 1s
xy=( `seq 100000` ) --> 1s
echo ${xy[*]} > /dev/null --> 550s (9m 10s)
What is causing this? Accessing 'xy' array directly, and printing the
elements out to <stdout> takes negligible time.
- parameter expansion is too slow,
William Park <=