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Top Forums Shell Programming and Scripting Script takes too long to complete Post 302976287 by mohtashims on Monday 27th of June 2016 12:31:54 PM
Old 06-27-2016
Quote:
Originally Posted by MadeInGermany
Yes, your inner loop (in post#1) should fill both variables in one stroke, use the correct InputFileSeparator
Code:
    input="alter.txt"
    while IFS="=" read -r searchterm replaceterm
    do
      echo "ST:$searchterm"
      echo "RT:$replaceterm"
    done < "$input"

If you look at the modified script in my last post .. it takes the same time with or without this suggestion.

I was able to bring down the execution time from 25 mins to -> just 7 mins.

Please suggest if there is anything else that can be done to optimize this ?

@RudiC:

I m sorry for not able to completely understand your suggestion.

Can you please elaborate the below only if the same is not covered in my last post with the updated script.

Quote:
Why don't you leave the looping to one single instance of e.g. awk ?
Create a list of all file candidates ( find can have several paths as starting points) and run awk , first reading all the search/replacement pairs, and then working those on all files presented.
 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
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