Could you please provide an example?
perl -wle '$_="abc" x $ARGV[0]; m/(((.){1,20}.+){1,34}){2,4}[d]/' 10
And now tell me how long your perl takes to find out that this regex fails ;-)
$ARGV[0] | time in s |
3 | 0.003 |
4 | 0.016 |
5 | 0.167 |
6 | 2.0 |
7 | 23.8 |
8 | 146 |
I wasn't patient enough to see how long it takes to match with $ARGV[0] == 9, or in other words against 27 characters of input.
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