Sponsored Content
Top Forums Shell Programming and Scripting Improve program efficiency (awk) Post 302338230 by danmero on Monday 27th of July 2009 10:53:26 AM
Old 07-27-2009
Quote:
Originally Posted by Phass
My question is how can I improve the efficiency calling awk just one time and not 3.
Code:
#!/bin/bash
eval $(ls -l $1 | awk 'NR>1{min=min?min:$5}{if(min >$5)min=$5}{if(max<$5)max=$5;suma+=$5}END{printf "min=%d max=%d suma=%d", min,max,suma}')

echo $min
echo $max
echo $suma

You can work from here.

---------- Post updated at 10:53 AM ---------- Previous update was at 10:13 AM ----------

Quote:
Originally Posted by Tytalus
something like:

Code:
#  ls -l | awk 'BEGIN{max=0;min=99999}NR>1{sum+=$5;if (min>$5){min=$5};if ($5>max){max=$5}}END{print sum;print max;print min}'
36420041
15763946
0

What if all files size on directory are greater that 99999 byte/98 kilobyte Smilie
 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

efficiency..

how efficient is it, and how practical is it to call outside programs in a shell script (bash) for small tasks? for example, say i have a script that might preform many tasks, one of those tasks may require root access; rather than implementing inside the script a method to use su or sudo to... (11 Replies)
Discussion started by: norsk hedensk
11 Replies

2. Shell Programming and Scripting

Perl: code efficiency for gmtime

I have the following Perl snippet: # get datetime @dt = gmtime(); $strdate = 1900 + $dt . addleadingzero(++$dt) . addleadingzero($dt) . addleadingzero($dt) . addleadingzero($dt) . addleadingzero($dt); # write to file $outfile = $strdate . ".txt"; getstore($url, $outfile) or die "Error:... (3 Replies)
Discussion started by: figaro
3 Replies

3. Shell Programming and Scripting

Problem with awk awk: program limit exceeded: sprintf buffer size=1020

Hi I have many problems with a script. I have a script that formats a text file but always prints the same error when i try to execute it The code is that: { if (NF==17){ print $0 }else{ fields=NF; all=$0; while... (2 Replies)
Discussion started by: fate
2 Replies

4. Shell Programming and Scripting

The efficiency between GREP and SED???

Hello Everyone! I am a newbie. I'd like to get key lines from a big txt file by Reg Exp, The file is nearly 22MB. GREP or SED?which may be the best choice,more efficient way? or any other best practise? Thank you in advance. Ever:) (5 Replies)
Discussion started by: ever
5 Replies

5. 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... (4 Replies)
Discussion started by: chetan.c
4 Replies

6. Shell Programming and Scripting

Looking to improve the output of this awk one-liner

I have the following awk one-liner I came up with last night to gather some data. and it works pretty well (apologies, I'm quite new with awk, and don't know how to format this pretty-printed). You can see the output with it. awk '{if ($8 == 41015 && $21 == "requests") arr+=$20;if ($8 == 41015... (3 Replies)
Discussion started by: DeCoTwc
3 Replies

7. Shell Programming and Scripting

File or Folder Efficiency?

I've got this program set up so that it creates files whose unique names specify the jobs their contents describe. In order to retrieve the information inside those files, I have to do a "grep" and awk or sed to extract it. I've just assumed that making a directory with that unique name that... (1 Reply)
Discussion started by: gmark99
1 Replies

8. Shell Programming and Scripting

Improve awk code that has three separate parts

I have a very inefficient awk below that I need some help improving. Basically, there are three parts, that ideally, could be combined into one search and one output file. Thank you :). Part 1: Check if the user inputted string contains + or - in it and if it does the input is writting to a... (4 Replies)
Discussion started by: cmccabe
4 Replies

9. UNIX for Advanced & Expert Users

About efficiency of parallel memory allocation

Hello, there. I'm a new beginner to Linux kernel and curious about its memory management. When multiple applications apply for memory space at the same time, how Linux kernel solve the resource contending problem for high performance? I have known that there is a buddy system for allocating and... (4 Replies)
Discussion started by: blackwall
4 Replies
TAU_GET_EVENT_VALS(3)					      TAU Instrumentation API					     TAU_GET_EVENT_VALS(3)

NAME
TAU_GET_EVENT_VALS - Gets user event data for given user events. SYNOPSIS
C/C++: TAU_GET_EVENT_VALS(const char **inUserEvents, int numUserEvents, int **numEvents, double **max, double **min, double **mean, double **sumSqe); DESCRIPTION
Retrieves user defined event data for the specified user defined events. The list of events are specified by the first parameter (eventList) and the user specifies the number of events in the second parameter (numUserEvents). TAU returns the number of times the event was invoked in the numUserEvents. The max, min, mean values are returned in the following parameters. TAU computes the sum of squares of the given event and returns this value in the next argument (sumSqe). EXAMPLE
C/C++ : const char **eventList; int numEvents; TAU_GET_EVENT_NAMES(eventList, numEvents); cout << "numEvents: " << numEvents << endl; if (numEvents > 0) { int *numSamples; double *max; double *min; double *mean; double *sumSqr; TAU_GET_EVENT_VALS(eventList, numEvents, numSamples, max, min, mean, sumSqr); for (int i=0; i<numEvents; i++) { cout << "------------------- "; cout << "User Event: " << eventList[i] << endl; cout << "Number of Samples: " << numSamples[i] << endl; cout << "Maximum Value: " << max[i] << endl; cout << "Minimum Value: " << min[i] << endl; cout << "Mean Value: " << mean[i] << endl; cout << "Sum Squared: " << sumSqr[i] << endl; } } } SEE ALSO
TAU_REGISTER_EVENT(3), TAU_REGISTER_CONTEXT_EVENT(3), TAU_GET_EVENT_NAMES(3) 08/31/2005 TAU_GET_EVENT_VALS(3)
All times are GMT -4. The time now is 06:46 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy