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Top Forums Shell Programming and Scripting Perl Array / pattern match large CPU usage Post 302358974 by Donkey25 on Monday 5th of October 2009 11:01:36 AM
Old 10-05-2009
Perl Array / pattern match large CPU usage

Hi,

I have one file in this format

Code:
20  value1
33   value2
56   value3

I have another file in this format:

Code:
34,30-SEP-09,57,100237775,33614510126,2,34
34,30-SEP-09,57,100237775,33620766654,2,34
34,30-SEP-09,108,100237775,33628458122,2,34
34,30-SEP-09,130,100237775,33635266741,2,254
34,30-SEP-09,135,100237775,33634650517,2,254
34,30-SEP-09,149,100237775,33660985888,2,34

What I want to do is for each value in the first column of the first file (lets call it x) I want to print the last column in the 2nd file if the 5th column begins with x.

So for the above, the first value in the first column of the first file is 20. None of the column4 values in the 2nd file begin with 20 so I don't want to print anything. For 33 from the first file I would want to print the value in the last column of the 2nd file for each line e.g 34,34,34,254,254,34.

I have this, it works but my CPU usage for this process is about 30%! Is there a way to make this more efficient?

Code:
#!/usr/local/bin/perl

use lib "/usr/local/include/modules";
use Getopt::Long;
use File::Copy;
use JDFunction;
use JDProcess;
use JDInput;
#use strict;
use FileHandle;
use IO;
use POSIX qw(strftime);
use Time::Local;

$file_name="/export/home/file2";
open(DATA, $file_name) || die ("Could not open file2!");
@my_data=<DATA>;
close(DATA);

$first_file="/export/home/file1";
open $FIRST_DATA, "<", $first_file or die "Could not open first data file";
while ( $line = <$FIRST_DATA> )
{
chomp ($line);
($code, $value) = split(/\t/, $line);

                foreach $line (@my_data)
                {
                chomp($line);
                ($id,$day,$ref,$valuey,$valuez,$evt_type,$subcode)=split(/,/,$line);

                        if ( $valuez =~ /^$code/ )
                        {
                        print "$code, $subcode\n";
                        }
                }

}
close $FIRST_DATA;

If you know a way to make this more efficient I'd be grateful!

Thanks
 

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CURLOPT_COOKIELIST(3)					     curl_easy_setopt options					     CURLOPT_COOKIELIST(3)

NAME
CURLOPT_COOKIELIST - add to or manipulate cookies held in memory SYNOPSIS
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_COOKIELIST, char *cookie); DESCRIPTION
Pass a char * to a cookie string. Such a cookie can be either a single line in Netscape / Mozilla format or just regular HTTP-style header (Set-Cookie: ...) format. This will also enable the cookie engine. This adds that single cookie to the internal cookie store. Exercise caution if you are using this option and multiple transfers may occur. If you use the Set-Cookie format and don't specify a domain then the cookie is sent for any domain (even after redirects are followed) and cannot be modified by a server-set cookie. If a server sets a cookie of the same name (or maybe you've imported one) then both will be sent on a future transfer to that server, likely not what you intended. To address these issues set a domain in Set-Cookie (doing that will include sub-domains) or use the Netscape format as shown in EXAMPLE. Additionally, there are commands available that perform actions if you pass in these exact strings: ALL erases all cookies held in memory SESS erases all session cookies held in memory FLUSH writes all known cookies to the file specified by CURLOPT_COOKIEJAR(3) RELOAD loads all cookies from the files specified by CURLOPT_COOKIEFILE(3) DEFAULT
NULL PROTOCOLS
HTTP EXAMPLE
/* This example shows an inline import of a cookie in Netscape format. You can set the cookie as HttpOnly to prevent XSS attacks by prepending #HttpOnly_ to the hostname. That may be useful if the cookie will later be imported by a browser. */ #define SEP " " /* Tab separates the fields */ char *my_cookie = "example.com" /* Hostname */ SEP "FALSE" /* Include subdomains */ SEP "/" /* Path */ SEP "FALSE" /* Secure */ SEP "0" /* Expiry in epoch time format. 0 == Session */ SEP "foo" /* Name */ SEP "bar"; /* Value */ /* my_cookie is imported immediately via CURLOPT_COOKIELIST. */ curl_easy_setopt(curl, CURLOPT_COOKIELIST, my_cookie); /* The list of cookies in cookies.txt will not be imported until right before a transfer is performed. Cookies in the list that have the same hostname, path and name as in my_cookie are skipped. That is because libcurl has already imported my_cookie and it's considered a "live" cookie. A live cookie won't be replaced by one read from a file. */ curl_easy_setopt(curl, CURLOPT_COOKIEFILE, "cookies.txt"); /* import */ /* Cookies are exported after curl_easy_cleanup is called. The server may have added, deleted or modified cookies by then. The cookies that were skipped on import are not exported. */ curl_easy_setopt(curl, CURLOPT_COOKIEJAR, "cookies.txt"); /* export */ curl_easy_perform(curl); /* cookies imported from cookies.txt */ curl_easy_cleanup(curl); /* cookies exported to cookies.txt */ AVAILABILITY
ALL was added in 7.14.1 SESS was added in 7.15.4 FLUSH was added in 7.17.1 RELOAD was added in 7.39.0 RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space. SEE ALSO
CURLOPT_COOKIEFILE(3), CURLOPT_COOKIEJAR(3), CURLOPT_COOKIE(3), CURLINFO_COOKIELIST(3), libcurl 7.54.0 April 26, 2016 CURLOPT_COOKIELIST(3)
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