ruby slow regex match

gistfile1.sh

salimane at Salimanes-MacBook-Pro  in ~
⚛ ruby --version
ruby 2.1.0p0 (2013-12-25 revision 44422) [x86_64-darwin13.0]

salimane at Salimanes-MacBook-Pro  in ~
⚛ cat regex.rb
regex = %r{^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$}
link = "https://www.facebook.com/DUSA.ve?ref=stream"
puts link =~ regex

salimane at Salimanes-MacBook-Pro  in ~
⚛ time ruby regex.rb

ruby regex.rb  114.95s user 0.11s system 99% cpu 1:55.07 total

salimane at Salimanes-MacBook-Pro  in ~
⚛ php -v
PHP 5.4.17 (cli) (built: Aug 25 2013 02:03:38)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies

salimane at Salimanes-MacBook-Pro  in ~
⚛ cat regex.php
<?php
$regex = '/^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/';
$link = "https://www.facebook.com/DUSA.ve?ref=stream";
echo preg_match($regex, link);

salimane at Salimanes-MacBook-Pro  in ~
⚛ time php regex.php
0php regex.php  0.07s user 0.01s system 96% cpu 0.079 total

salimane at Salimanes-MacBook-Pro  in ~
⚛ java -version
java version "1.7.0_21"
Java(TM) SE Runtime Environment (build 1.7.0_21-b12)
Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)

salimane at Salimanes-MacBook-Pro  in ~
⚛ cat Regex.java
public class Regex {

  public static void main(String[] args) {
    String regex = "^(https?://)?([\\da-z.-]+).([a-z.]{2,6})([/\\w .-]*)*/?$";
    String link = "https://www.facebook.com/DUSA.ve?ref=stream";
    System.out.println(link.matches(regex));
  }
}

salimane at Salimanes-MacBook-Pro  in ~
⚛ javac Regex.java

salimane at Salimanes-MacBook-Pro  in ~
⚛ time java Regex
false
java Regex  0.75s user 0.04s system 136% cpu 0.584 total

salimane at Salimanes-MacBook-Pro  in ~
⚛ python --version
Python 2.7.3

salimane at Salimanes-MacBook-Pro  in ~
⚛ cat regex.py
import re
regex = r'^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$'
link = "https://www.facebook.com/DUSA.ve?ref=stream"
print re.match(regex, link)

salimane at Salimanes-MacBook-Pro  in ~
⚛ time python regex.py
Traceback (most recent call last):
  File "regex.py", line 4, in <module>
    print re.match(regex, link)
  File "/opt/boxen/homebrew/Cellar/python/2.7.3-boxen2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/re.py", line 137, in match
    return _compile(pattern, flags).match(string)
  File "/opt/boxen/homebrew/Cellar/python/2.7.3-boxen2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/re.py", line 242, in _compile
    raise error, v # invalid expression
sre_constants.error: nothing to repeat
python regex.py  0.02s user 0.01s system 43% cpu 0.079 total

Using python 2.7.5, I get no match on this regex.

>>> import re
>>> regex = r'^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$'
>>> link = "https://www.facebook.com/DUSA.ve?ref=stream"
>>> print re.match(regex, link)
None

I do get a match on this:

>>> import re
>>> regex = r'^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?.*$'
>>> link = "https://www.facebook.com/DUSA.ve?ref=stream"
>>> print re.match(regex, link)
<_sre.SRE_Match object at 0x7fb2bf8bcb58>