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Re^2: 5.10.0 regex slowdown

by BrowserUk (Pope)
on Feb 21, 2008 at 11:20 UTC ( #669240=note: print w/ replies, xml ) Need Help??


in reply to Re: 5.10.0 regex slowdown
in thread 5.10.0 regex slowdown

Okay. Thanks for the clarifications. If I can do anything to assist further let me know.


Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.


Comment on Re^2: 5.10.0 regex slowdown
Re^3: 5.10.0 regex slowdown
by demerphq (Chancellor) on Feb 21, 2008 at 11:34 UTC

    It would neat to see the re=debug dump of your pattern, piped into grep TRIE to see whats going on. I suspect that you can do it easiest with perl -c on code with a use re 'debug'.

    perl -c -Mre=debug SCRIPT 2>&1 | grep TRIE

    Should do it.

    Actually if you could grep for JUMP and JMP too it would be good.

    ---
    $world=~s/war/peace/g

      With -c -Mre=debug, I get no output other than 668954.p10 syntax OK, but as the regex is built at runtime, I wouldn't expect to?

      Running the code on the non-pathological case with use re 'debug'; I get 2 million lines of log of which 11,282 contain 'TRIE'; and the are no 'JUMP's or 'JMP's.

      The pathological case is running (and has already reached 10 million+ lines), but it looks like it is going to take quite a while. Can you /msg me your email and we can take this off line.


      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.
      greetings demerphq,

      I've run both cases with -D512, see Re^3: 5.10.0 regex slowdown. Do you want more of that? ;-)

      --shmem

      _($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                                    /\_¯/(q    /
      ----------------------------  \__(m.====·.(_("always off the crowd"))."·
      ");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

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