Efficiently querying one string against multiple regexes

Question

Lets say that I have 10,000 regexes and one string and I want to find out if the string matches any of them and get all the matches. The trivial way to do it would be to jus

Answer 1

I use Ragel with a leaving action:

action hello {...}
action ello {...}
action ello2 {...}
main := /[Hh]ello/  % hello |
        /.+ello/ % ello |
        any{0,20} "ello"  % ello2 ;

The string "hello" would call the code in the action hello block, then in the action ello block and lastly in the action ello2 block.

Their regular expressions are quite limited and the machine language is preferred instead, the braces from your example only work with the more general language.