Re: getline() very very slow on localhost on 5.X

On Thu, 3 Feb 2005, Martin Blapp wrote:

> Can someone confirm that this is still a problem on 6.X ? Something is
> really broken here ... 

Could you:

(1) Try connecting to 127.0.0.1 instead of localhost?
(2) If the problem persists, try writing a C based client to do the same
    thing?
(3) Use tcpdump on lo0 to create a packet trace?

What leads you to conclude that getline() is the problem, as opposed to
the pop server, etc?

Robert N M Watson


> 
> Martin
> 
> FreeBSD 5.x connecting to localhost
> 
> time perl5.6.1 -MIO::Socket -e '$s = new IO::Socket::INET("localhost:110");
> $s->print("user USER\r\n");
> $s->getline(); $s->print("pass PASS\r\n"); $s->getline(); $s->print("LIST\r\n");
> for ($i = 1; $i
> < 2000; ++$i) { $j=1 + $i%500;$s->print("top $j 0\r\n"); }
> $s->print("quit\r\n"); while (defined($_
> = $s->getline())) { print $_; }' > xxx
> 
> real    2m9.509s
> user    0m0.559s
> sys     0m0.184s
> 
> FreeBSD 5.x connecting to the external IP of the server
> 
> time perl -MIO::Socket -e '$s = new IO::Socket::INET("server:110");
> $s->print("user USER\r\n");
> > $s->getline(); $s->print("pass PASS\r\n"); $s->getline();
> $s->print("LIST\r\n");
> for ($i = 1; $i
> > < 2000; ++$i) { $j=1 + $i%500;$s->print("top $j 0\r\n"); }
> $s->print("quit\r\n"); while (defined($_
> > = $s->getline())) { print $_; }' > xxx
> 
> real    0m6.932s
> user    0m0.553s
> sys     0m0.187s
> 
> Martin Blapp, <mb_at_imp.ch> <mbr_at_FreeBSD.org>
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