graff, based on your suggestion my script working pretty well now.
Thank you once again!

However, I'm not able to track down original pattern as $1 is no longer working as you suggested in first example.
print "\n$arg1\n$1\n";
I have 1000+ patterns and I will add more. I need this scanner to fight against those bloody spammers.
See this example file, but with thousands of links and similar lines. 
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url>
    <loc>http://test.com/index.html</loc>
    <lastmod>2009-08-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
    </url>
<url>
    <loc>http://test.com/page_1.html</loc>
    <lastmod>2009-08-06</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    </url>
<url>
    <loc>http://test.com/page_2.html</loc>
    <lastmod>2009-08-10</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.4</priority>
    </url>

[download]

I don't know why patterns like these (each on newline) will fail against this file. The script enter an interminable loop, using an entire cpu core. 
<a href=.*<a href=.*poker
page.{0,10}.html.*page.{0,10}.html.*page.{0,10}.html.*map

[download]

When I change them to 
<a href=.*<a href
page.{0,10}.html.*page.{0,10}.html.*page.{0,10}.html

[download]

working without problem.

In reply to Re^2: Comparing pattern by mrc
in thread Comparing pattern by mrc

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