Sponsored Content
Top Forums UNIX for Dummies Questions & Answers Performance analysis sed vs awk Post 302667049 by Irishboy24 on Thursday 5th of July 2012 02:16:56 PM
Old 07-05-2012
Performance analysis sed vs awk

Hi Guys,

I've wondered for some time the performance analysis between using sed and awk. say i want to print lines from a very large file. For ex say a file with 100,000 records. i want to print the lines 25,000 to 26,000 i can do so by the following commands:

Code:
sed -n '25000,26000 p' filename

Code:
awk 'NR==25000,NR==26000' filename

both will yield the same results but which one is better or is there such a thing ?

Thanks
 

8 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

AWK script: decrypt text uses frequency analysis

Ez all! I have a question how to decrypt text uses letter frequency analysis. I have code which count the letters, but what i need to do after that. Can anybody help me to write a code. VERY NEEDED! My code now: #!/usr/bin/awk -f BEGIN { FS="" } { for (i=1; i <= NF; i++) { if ($i... (4 Replies)
Discussion started by: SerJel
4 Replies

2. UNIX for Advanced & Expert Users

sed performance

hello experts, i am trying to replace a line in a 100+mb text file. the structure is similar to the passwd file, id:value1:value2 and so on. using the sed command sed -i 's/\(123\):\(\{1,\}\):/\1:bar:/' data.txt works nicely, the line "123:foo:" is replaced by "123:bar:". however, it takes... (7 Replies)
Discussion started by: f3k
7 Replies

3. UNIX for Advanced & Expert Users

WEB Server Log File Analysis using awk/sed/grep

I'm trying to find a way to show large page sizes (page size in K) from multiple web server log files. Essentially I want to show only rows from a file where a specific column is larger than some value. Has anyone ever done this type of log analysis? If so, a snippet of code would be very... (2 Replies)
Discussion started by: mike_cataldo@ad
2 Replies

4. Shell Programming and Scripting

Increase sed performance

I'm using sed to do find and replace. But since the file is huge and i have more than 1000 files to be searched, the script is taking a lot of time. Can somebody help me with a better sed command. Below is the details. Input: 1 1 2 3 3 4 5 5 Here I know the file is sorted. ... (4 Replies)
Discussion started by: gpaulose
4 Replies

5. Linux

Routing table vulnerability comparison between two versions and analysis of performance in a scenari

Hi Routing tables in a typical linux kernel are implemented using hash data structures. So if the hash table is forced to behave more like a linked list(i.e create chaining) the purpose of using hash is defeated and time complexity increases. I want to try to assess the performance deterioration... (0 Replies)
Discussion started by: coolvaibhav
0 Replies

6. Shell Programming and Scripting

Date and time range extraction via Awk or analysis script?

Hello does anyone know of an awk that will extract log file entries between a specific date and time range, eg: awk '/15\/Dec\/2010:16:10:00/, /15\/Dec\/2010:16:15:00/' access_log but one that works? Or a free command line log file analysis tool/script? I'd like to be able to view... (2 Replies)
Discussion started by: competitions
2 Replies

7. Shell Programming and Scripting

Log Analysis with AWK with Time difference

I would like to write a shell script that calculated the time difference bettween the log entries. If the time difference is higher as 200 sec. print the complette lines out. My Problem is, i am unable to jump in the next line and calculate the time difference. Thank you for your Help. ... (5 Replies)
Discussion started by: fabian3010
5 Replies

8. Red Hat

What is the best tools for performance data gathering and analysis?

Dear Guru, IHAC who complaint that his CentOS is getting performance issue. I have to help him out of there. Could you please tell me which tools is better to gathering the whole system performance data? -- CPU/Memory/IO(disk & Network)/swap I would like the tools could be... (6 Replies)
Discussion started by: devyfong
6 Replies
GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for lines containing a given pattern SYNOPSIS
grep [-elnsv] pattern [file] ... OPTIONS
-e -e pattern is the same as pattern -c Print a count of lines matched -i Ignore case -l Print file names, no lines -n Print line numbers -s Status only, no printed output -v Select lines that do not match EXAMPLES
grep mouse file # Find lines in file containing mouse grep [0-9] file # Print lines containing a digit DESCRIPTION
Grep searches one or more files (by default, stdin) and selects out all the lines that match the pattern. All the regular expressions accepted by ed and mined are allowed. In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or 1 occurrences, and | can be used between two regular expressions to mean either one of them. Parentheses can be used for grouping. If a match is found, exit status 0 is returned. If no match is found, exit status 1 is returned. If an error is detected, exit status 2 is returned. SEE ALSO
cgrep(1), fgrep(1), sed(1), awk(9). GREP(1)
All times are GMT -4. The time now is 04:49 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy