Improve performance of echo |awk


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Improve performance of echo |awk
# 1  
Old 04-12-2012
Improve performance of echo |awk

Hi,

I have a script which looks like this.
Input file
data1^20
data2^30


Code:
 
#!/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 improve the performance or better the code?

Thanks,
Chetan.C
# 2  
Old 04-12-2012
Try this:
Code:
awk -F"^" '{print $2; print $1 " | gzip | wc -c"}' $file

# 3  
Old 04-12-2012
Hi,

Thanks for response.
Actually i need to have the output in the below format only.
data1
20
data2
30.

As i am feeding it to datstage code.

Tried out the code you gave its printing gzip |wc -c also.

Thanks,
Chetan.C
# 4  
Old 04-12-2012
Beyond a certain point you can't improve the performance of running gzip thousands of separate times to process tiny strings. This might be some improvement since awk is replaced by pure shell builtins:

Code:
while IFS="^" read FIELD1 FIELD2
do
        echo "$FIELD2"
        echo "$FIELD1" | gzip | wc -c
done <"$file"

This User Gave Thanks to Corona688 For This Post:
# 5  
Old 04-12-2012
Quote:
Originally Posted by Corona688
Beyond a certain point you can't improve the performance of running gzip thousands of separate times to process tiny strings. This might be some improvement since awk is replaced by pure shell builtins:

Code:
while IFS="^" read FIELD1 FIELD2
do
        echo "$FIELD2"
        echo "$FIELD1" | gzip | wc -c
done <"$file"


Works Astoundingly!!!
Thanks a lot.
close to 50% execution time is reduced.


Thanks again,
Chetan.C
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. 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... (11 Replies)
Discussion started by: yifangt
11 Replies

2. 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 |... (5 Replies)
Discussion started by: vikatakavi
5 Replies

3. Programming

Help with improve the performance of grep

Input file: #content_1 12314345345 242467 #content_14 436677645 576577657 #content_100 3425546 56 #content_12 243254546 1232454 . . Reference file: content_100 (1 Reply)
Discussion started by: cpp_beginner
1 Replies

4. 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> ......... (3 Replies)
Discussion started by: vanitham
3 Replies

5. 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... (6 Replies)
Discussion started by: poweroflinux
6 Replies

6. 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... (10 Replies)
Discussion started by: apsprabhu
10 Replies

7. 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... (3 Replies)
Discussion started by: sirababu
3 Replies

8. 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 (2 Replies)
Discussion started by: mazhar99
2 Replies

9. 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... (2 Replies)
Discussion started by: pooga17
2 Replies

10. 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... (3 Replies)
Discussion started by: Nicol
3 Replies
Login or Register to Ask a Question