From: Olonichev Sergei <olonichev@...>
Date: 2002-03-01T18:40:56+09:00
Subject: Ruby Regular Expression problem

Hello,

I faced the problem of Regular Expression (RE) matching speed in real
application, a model of it is shown below.
What RE mechanisms are deployed in Ruby? Are there any Ruby libraries of
DFA-based RE?

1.
echo "=XX=================================" | grep '/X((.)*..?.)+X/'

Ok.


2.
echo "=XX=================================" | gawk '/X((.)*..?.)+X/'

Ok.


3.
echo "=XX=================================" | ruby -e 'a=$stdin.gets; if a
=~ "X((.)*..?.)+X" then puts $& end'

Hangs up !!!

ruby -v

ruby 1.6.2 (2000-12-18) [i386-cygwin]


BR,
Sergei