Help with improve the performance of grep Post: 302557315

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

improve performance by using ls better than find

Hi , i'm searching for files over many Aix servers with rsh command using this request : find /dir1 -name '*.' -exec ls {} \; and then count them with "wc" but i would improve this search because it's too long and replace directly find with ls command but "ls *. " doesn't work. and...

2. Shell Programming and Scripting

How to improve grep performance...

Hi All, I am using grep command to find string "abc" in one file . content of file is *********** abc = xyz def= lmn ************ i have given the below mentioned command to redirect the output to tmp file grep abc file | sort -u | awk '{print #3}' > out_file Then i am searching...

3. UNIX for Dummies Questions & Answers

Improve Performance

hi someone tell me which ways i can improve disk I/O and system process performance.kindly refer some commands so i can do it on my test machine.thanks, Mazhar

4. Shell Programming and Scripting

Any way to improve performance of this script

I have a data file of 2 gig I need to do all these, but its taking hours, any where i can improve performance, thanks a lot #!/usr/bin/ksh echo TIMESTAMP="$(date +'_%y-%m-%d.%H-%M-%S')" function showHelp { cat << EOF >&2 syntax extreme.sh FILENAME Specify filename to parse EOF...

5. Shell Programming and Scripting

Improve the performance of a shell script

Hi Friends, I wrote the below shell script to generate a report on alert messages recieved on a day. But i for processing around 4500 lines (alerts) the script is taking aorund 30 minutes to process. Please help me to make it faster and improve the performace of the script. i would be very...

6. Shell Programming and Scripting

Want to improve the performance of script

Hi All, I have written a script as follows which is taking lot of time in executing/searching only 3500 records taken as input from one file in log file of 12 GB Approximately. Working of script is read the csv file as an input having 2 arguments which are transaction_id,mobile_number and search...

7. Shell Programming and Scripting

How to improve the performance of parsers in Perl?

Hi, I have around one lakh records. I have used XML for the creation of the data. I have used these 2 Perl modules. use XML::DOM; use XML::LibXML; The data will loo like this and most it is textual entries. <eid>19000</eid> <einfo>This is the ..........</einfo> .........

8. Shell Programming and Scripting

Improve performance of echo |awk

Hi, I have a script which looks like this. Input file data1^20 data2^30 #!/bin/sh file"/home/Test.txt" while read line do echo $line |awk 'BEGIN { FS = "^" } ; { print $2 }' echo $line |awk 'BEGIN { FS = "^" } ; { print $1 }' | gzip | wc -c done <"$file" How can i...

9. UNIX for Dummies Questions & Answers

How to improve the performance of this script?

Hi , i wrote a script to convert dates to the formate i want .it works fine but the conversion is tkaing lot of time . Can some one help me tweek this script #!/bin/bash file=$1 ofile=$2 cp $file $ofile mydates=$(grep -Po '+/+/+' $ofile) # gets 8/1/13 mydates=$(echo "$mydates" | sort |...

10. Programming

Improve the performance of my C++ code

Hello, Attached is my very simple C++ code to remove any substrings (DNA sequence) of each other, i.e. any redundant sequence is removed to get unique sequences. Similar to sort | uniq command except there is reverse-complementary for DNA sequence. The program runs well with small dataset, but...

LEARN ABOUT REDHAT

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

improve performance by using ls better than find

Discussion started by: Nicol

2. Shell Programming and Scripting

How to improve grep performance...

Discussion started by: pooga17

3. UNIX for Dummies Questions & Answers

Improve Performance

Discussion started by: mazhar99

4. Shell Programming and Scripting

Any way to improve performance of this script

Discussion started by: sirababu