It's very easy to try, and not so hard to check the source.

The source shows 0 won't be replaced, only undef: 

    my $timeout = delete $cnf{timeout};
    $timeout = 3*60 unless defined $timeout;

[download]

To try a positive number, zero, and a negative number, I wrote the following: 

#! /usr/bin/perl
use warnings;
use strict;
use LWP::UserAgent;
for my $t (0, -1, 1) {
    my $ua = LWP::UserAgent->new( timeout => $t );
    print "*** $t\n", $ua->get('http://www.perl.org')->{_content}, "\n
+";
}

[download]

The output varies, but it's usually something like 

*** 0
Can't connect to www.perl.org:443

Connection timed out at /usr/lib/perl5/vendor_perl/5.18.2/LWP/Protocol
+/http.pm line 51.

*** -1
Can't connect to www.perl.org:80 (timeout)

LWP::Protocol::http::Socket: connect: timeout at /usr/lib/perl5/vendor
+_perl/5.18.2/LWP/Protocol/http.pm line 51.

*** 1

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
    <title>The Perl Programming Language - www.perl.org</title>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8" 
+/>
<!-- ... and the rest of the page ... -->

[download]

The zero sometimes makes it for some pages, 1 sometimes times out, -1 always fails the same way.

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

[download]

In reply to Re: Timeout 0 in LWP::UserAgent by choroba
in thread Timeout 0 in LWP::UserAgent by perl_help26

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