Dear Monks,

Today morning I was a reading Re: Timeout alarm for regex, by wfsp. I am very curious to know why the below regex is slow. 

$_ = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
/a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*[b]/;
print "Hello\n";

[download]

Could anyone explain me that regex in all perspective ?

Update:Code is added.

"Keep pouring your ideas"

In reply to slow regular expressions by jesuashok

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