From: Eric Hodel <drbrain@...7.net>
Date: 2002-12-14T08:31:18+09:00
Subject: Re: Ruby slow??


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Garriss, Michael (Michael.Garriss@abacus-direct.com) wrote:

> Found this site about how languages stack up against each other.  This te=
st
> put Ruby far behind to others.  Has this changed with 1.7?  What's the de=
al
> with these results?
>=20
> http://www.bagley.org/~doug/shootout/bench/prodcons/

This is one of the 'same way' tests, for the same problem, I'd rather
use Queue, which judging from the comparitive speed of my machine,
brings ruby right in there around python.

Note that what this test is really testing is the speed of the
lock/unlock of the Mutex, thread switching, and the CV.  Reading
Alternates, there is a Python example that uses a Queue too.

code:

#!/usr/local/bin/ruby

require 'thread'

def main(n)
  q =3D Queue.new # shared
  consumed =3D produced =3D 0
  consumer =3D Thread.new do
    i =3D 0=20
    until i =3D=3D n do
      i =3D q.pop
      consumed +=3D 1=20
    end
  end
  producer =3D Thread.new do
    1.upto(n) do |i|
      q.push(i)
      produced +=3D 1=20
    end
  end
  producer.join
  consumer.join
  puts "#{produced} #{consumed}"
end

main(Integer(ARGV.shift || 1))
# end code

$ time ruby prodcon-queue.rb 100000=20
100000 100000

real    0m41.863s
user    0m38.061s
sys     0m0.235s

$ time ruby prodcon-bagley.rb 100000
100000 100000

real    1m56.206s
user    1m41.711s
sys     0m0.742s

--=20
Eric Hodel - drbrain@segment7.net - http://segment7.net
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