Efficient regular expression pattern ?

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Hi,

I'm building an application that analyse a flow of url in order to detect
some pages.
I've a very huge list of regular expressions (up to several thousands) that
I have to check on all urls.

Each regular expression will be evaluated agains all urls.

How can I write the code in order to be the most efficient ?

My fisrt idea is to create a List<Regex> that I populate once, and each time
an url is incoming, I do a foreach(Regex r in Regexs).

But I'm afraid this process is quite slow since urls can input up to
10/seconds.

I'd apreciate any comments or suggestions.

Thanks,
Steve


.

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