From: Joseph McDonald <joe@...>
Date: 2001-03-29T08:17:32+09:00
Subject: [ruby-talk:13294] ruby slowww socket handling


I've got a simple server that spits back its requests to the client.
when the client is written in ruby, I can only pump through about
62 messages per second.  The same thing in perl does about
50,000 messages per second!  Has anyone else noticed this discrepency?
It's pretty huge!  I can speed things up a bit by forking off lots of
clients, but still can't even begin to approach the speed that perl
gives.   Also, I notice the same problem when the server is written
in ruby, the tests below were using a server written in perl.

Any ideas about this problem?

This is on linux with the latest kernel.

thanks,
-joe

Here is the ruby client:

#!/usr/bin/env ruby

require 'socket'
REQUESTS = 500

puts "start: " << `date`
begin
  socket = TCPSocket.new('localhost', 5000)
rescue
  puts "socket error: " + $!
  exit
end

REQUESTS.times do |i|
  socket.puts("abc=def")
  answer = socket.gets

end
socket.close

puts "Sent #{REQUESTS} requests."
puts "end: " << `date`

./test-client.rb
start: Wed Mar 28 15:07:55 PST 2001
Sent 500 requests.
end: Wed Mar 28 15:08:15 PST 2001


Here is the perl version:
------------------------------------------------------------------

#!/usr/bin/perl

use Socket;
use strict;

use constant REQUESTS => 50000;

my $Remote_host = 'localhost';
my $Remote_port = 5000;

# create a socket
socket(SERVER, PF_INET, SOCK_STREAM, getprotobyname('tcp'));

my $paddr = sockaddr_in($Remote_port, inet_aton($Remote_host));

# connect
connect(SERVER, $paddr) or die "$!\n";
select(SERVER); $| = 1;
select(STDOUT);

for (0..REQUESTS) {
    print SERVER "abc=def\n";
    my $line = <SERVER>;
}

./test-client.pl
start: Wed Mar 28 15:10:08 PST 2001
end: Wed Mar 28 15:10:09 PST 2001