Well one hits the limit for the trie optimization, splitting into multiple regexes should be done.

Since   $x =~ /a|b|c|d/ is like  $x =~ /a|b/ or $x =~ /c|d/

i.e. it'll scale well.

But that's lost energy as long as the OP doesn't clarify his energy.

Hi porg,

Note that in that thread, duelafn pointed out the modules Regexp::Trie and Regexp::Assemble, which might be helpful as well. Also, there's Regexp::Optimizer, which apparently (I haven't tried it out yet) has the ability to modify existing regexes, e.g. qr/foobar|fooxar|foozap/ becomes qr/foo(?:[bx]ar|zap)/.

Hope this helps,
-- Hauke D

Yes ... and all reports that this technique was already in use before you joined the monastery are alternative facts! ;)

Hi LanX,

all reports that this technique was already in use before you joined the monastery are alternative facts

I never claimed I invented the technique :-P Relevant?

Regards,
-- Hauke D

Oh you meant you are shameless?

...okay... ;-)

Cheers Rolf
_{(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!}