Slow Perl script: how to speed up? Post: 302506325

9 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

network speed is slow

Hello, everyone: i encounter a problem these days , pls help me ,thanks in advance. my env: machine: ES40 A ES40 B os: true64 Unix 4.0f note: src.tar 8M network card speed 100M my problem: ...

2. Shell Programming and Scripting

Optimize/speed-up perl extraction

Hi, Is there a way I can extract my data faster. You know my data is 1.2 GB text file with 8Million rows with 38 columns/fields. Imagine how huge this is. How I can optimized the data extraction using perl. That is why I'm creating a script to filter only those informations that I need. Is...

3. UNIX for Advanced & Expert Users

speed test +20,000 file existance checks too slow

Need to make a very fast file existence checker. Passing in 20-50K num of files In the code below ${file} is a file with a listing of +20,000 files. test_speed is the script. I am commenting out the results of <time test_speed try>. The normal "test -f" is much much too slow when a system...

4. Shell Programming and Scripting

Speed up this script!

I have a script that processes a fair amount of data -- say, 25-50 megs per run. I'd like ideas on speeding it up. The code is actually just a preprocessor -- I'm using another language to do the heavy lifting. But as it happens, the preprocessing takes much more time than the final processing...

5. Filesystems, Disks and Memory

data from blktrace: read speed V.S. write speed

I analysed disk performance with blktrace and get some data: read: 8,3 4 2141 2.882115217 3342 Q R 195732187 + 32 8,3 4 2142 2.882116411 3342 G R 195732187 + 32 8,3 4 2144 2.882117647 3342 I R 195732187 + 32 8,3 4 2145 ...

6. Shell Programming and Scripting

Net::SSH::Perl slow to login.

I have some sample code that's supposed to ssh to another machine using Net::SSH::Perl, execute a command, and print the output of that command. It's very basic, and it works. However, I noticed that upon logging in: $ssh->login('username','password'); It takes roughly 10-13 seconds to...

7. Shell Programming and Scripting

How can i speed this script up?

Hi, Im quite new to scripting and would like a bit of assistance with trying to speed up the following script. At the moment it is quite slow.... Any way to improve it? total=111120 while do total=`expr $total + 1` INCREMENT=$total firstline = "blablabla" secondline = "blablabla"...

8. Shell Programming and Scripting

Help me with speed up this script

hey guys i have a perl script wich use to compare hashes but it tookes a long time to do that so i wich i will have the soulition to do it soo fast he is the code <redacted>

9. Solaris

Rsync quite slow (using very little cpu): how to improve its speed?

I have "inherited" a OmniOS (illumos based) server. I noticed rsync is significantly slower in respect to my reference, FreeBSD 12-CURRENT, running on exactly same hardware. Using same hardware, same command with same source and target disks, OmniOS r151026 gives: test@omniosce:~# time...

LEARN ABOUT REDHAT

autofs

AUTOFS(8)						      System Manager's Manual							 AUTOFS(8)

NAME

       /etc/init.d/autofs - Control Script for automounter

SYNOPSIS

       /etc/init.d/autofs start|stop|reload

DESCRIPTION

       autofs  control	the  operation of the automount(8) daemons running on the Linux system. Usually autofs is invoked at system boot time with
       the start parameter and at shutdown time with the stop parameter. The autofs script can also manually be invoked by the system  administra-
       tor to shut down, restart or reload the automounters.

OPERATION

       autofs  will consult a configuration file /etc/auto.master (see auto.master(5)) to find mount points on the system. For each of those mount
       points a automount(8) process is started with the appropriate parameters. You can check the active mount points for  the  automounter  with
       the  /etc/init.d/autofs	status	command. After the auto.master configuration file is processed the autofs script will check for an NIS map
       with the same name. If such a map exists then that map will be processed in the same way as the auto.master map. The NIS map will  be  pro-
       cessed last.

       /etc/init.d/autofs  reload  will  check	the current auto.master map against running daemons. It will kill those daemons whose entries have
       changed and then start daemons for new or changed entries.

       If a map is modified then the change will become effective immediately. If the auto.master map is modified then the autofs script  must	be
       rerun to activate the changes.

       /etc/init.d/autofs status will display the current configuration and a list of currently running automount daemons.

SEE ALSO

       automount(8), autofs(5), auto.master(5).

AUTHOR

       This  manual  page  was	written  by  Christoph	Lameter  <chris@waterf.org>,  for  the	Debian GNU/Linux system.  Edited by H. Peter Anvin
       <hpa@transmeta.com>.

								    9 Sep 1997								 AUTOFS(8)