test.pl 
#!/usr/bin/perl

use strict;
use IO::Socket;
use LWP::UserAgent;

my $host = "bbs.chinaunix.net";
my $html = "";
my $start = "";
my $end = "";

my $ua = LWP::UserAgent -> new;
$ua -> timeout( 30 );
$ua -> agent( 'Mozilla/4.76 [en] (Win98; U)' );
$ua -> default_header( 'Pragma' => 'no-cache', 'Accept' => '*/*');

$start = time;
print "LWP strat " . $start . "\n";
my $resp = $ua -> get( "http://$host/" );
if ( $resp -> is_success )
    {
    $html = $resp->status_line ."\n\n";
    $html .= $resp->headers_as_string ."\n\n";
    $html .= $resp -> content;
    }
$end = time;
print "LWP end " . $end . "\n";
print "LWP time = " . ($end - $start) . "\n\n";

$html = "";
my $geturl=qq~GET / HTTP/1.1
Accept: */*
User-Agent: Mozilla/4.76 [en] (Win98; U)
Host: $host
Connection: Keep-Alive

~;

$start = time;
print "IO::Socket::INET strat " . $start . "\n";

my $socket = IO::Socket::INET->new(Proto=>"tcp", PeerAddr=>"$host", Pe
+erPort=>80, Timeout => 30);
$socket->autoflush(1);

my @html;
if($socket){
print $socket "$geturl";
print "IO::Socket::INET time1 " . time . "\n";
@html=<$socket>; # Attention here, why spent so much time?

print "IO::Socket::INET time2 " . time . "\n";
close($socket);
}else{ 
}
$html = join("",@html);
$end = time;
print "IO::Socket::INET end " . $end . "\n";
print "IO::Socket::INET time = " . ($end - $start) . "\n\n";

[download]
Results: 
C:\>perl test.pl
LWP strat 1192833431
LWP end 1192833432
LWP time = 1

IO::Socket::INET strat 1192833432
IO::Socket::INET time1 1192833432
IO::Socket::INET time2 1192833448
IO::Socket::INET end 1192833448
IO::Socket::INET time = 16

[download]
Why so many differences? 
@html=<$socket>; # Attention here, why spent so much time?

[download]
Solutions? Thank you.

In reply to IO::Socket::INET slower than the LWP::UserAgent how so many? by ibbackuptest

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