Subject:
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Re: Perl5 regexen: exponential backtracking behavior when mixing \n and \s
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Sun, 17 Dec 2000 03:29:26 GMT
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Viewed:
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55 times
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Todd Lehman wrote:
>
> Anyone out there running Perl 5.6 or higher? Try running this little test
> proggy that compares the approximate CPU execution times of two regexen:
[lindsey@wolrab ~]$ uname -a
Linux wolrab 2.2.16-22smp #1 SMP Tue Aug 22 16:39:21 EDT 2000 i686 unknown
[lindsey@wolrab ~]$ cat /etc/redhat-release
Red Hat Linux release 7.0 (Guinness)
s/(?:\n[ \t]*)+$//
0 0.00
1 0.00
2 0.00
3 0.00
4 0.00
5 0.00
6 0.00
7 0.00
8 0.00
9 0.00
10 0.00
11 0.00
12 0.00
13 0.00
14 0.00
15 0.00
16 0.00
17 0.00
18 0.00
19 0.00
20 0.00
21 0.00
22 0.00
s/(?:\n\s*)+$//
0 0.00
1 0.00
2 0.00
3 0.00
4 0.00
5 0.00
6 0.00
7 0.00
8 0.00
9 0.00
10 0.00
11 0.00
12 0.00
13 0.00
14 0.00
15 0.00
16 0.00
17 0.00
18 0.00
19 0.00
20 0.00
21 0.00
22 0.00
Chris
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