I have a script (relevent code below) that evaluates some command line options. One of these options prints out the version and exits. The thing I don't like is that it takes a few seconds to print out the version. Not a big deal, but a little irritating.

I know the reason is all of the modules being 'use'ed. I know I could explicitely import the important parts of the modules and that may help, but I'm not sure. If I comment out all the 'use' lines except for 'use Getopt::Long' the './program.pl --version' comes back immediately. This is the type of performance I would like when the whole thing is done.

Does anyone have any ideas on how I could speed this up?

TIA, gnu.

code below 

use strict;
use IO::Select;
use IO::Socket;
use Fcntl;
use POSIX qw(:signal_h WNOHANG);
use Net::SNMP;
use DBI;
use Sys::Hostname;
use Getopt::Long qw(:config pass_through );

$|++;
umask(0177);

(my $VERSION  = '$Revision: 1.23 $') =~ s/\$(.+) \$/$1/;
my $MAXCHILDREN       = 10;
my $inputFile         =  "./mping.lookup";
my $path              =  "./unix_socket";
my $OID               =  '.1.3.6.1.4.1.15102.2.1.1.1';
my $interval          =  60;
my %source;
my %failures;
my $dump              = 0;
my $run               = 0;
my $version           = 0;
my %options           = ( 'version'    => \$version,
                          'children=i' => \$MAXCHILDREN,
                          'input'      => \$inputFile,
                          'socket'     => \$path,
                          'dump'       => \$dump,
                          'run'        => \$run,
                        );

$SIG{TERM} = $SIG{INT}  = sub { unlink $path; exit 0 };

GetOptions(%options);

if (${$options{dump}}) {
   print $VERSION,"\n";
   print "There are $MAXCHILDREN child processes by default\n";
   print "Input file is ",${$options{input}},":\n";
   print "Comm socket is ",${$options{socket}},":\n";
   exit if ! ${$options{run}};
}

if (${$options{version}}) {
   print $VERSION,"\n";
   exit if ! ${$options{run}};
}

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In reply to Script Startup Time by gnu@perl

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