Beefy Boxes and Bandwidth Generously Provided by pair Networks
P is for Practical
 
PerlMonks  

Re^6: Suggestion for regular expression speed improvement.

by bala.linux (Novice)
on Jun 15, 2009 at 14:46 UTC ( #771671=note: print w/ replies, xml ) Need Help??


in reply to Re^5: Suggestion for regular expression speed improvement.
in thread Suggestion for regular expression speed improvement.

Exactly. This was my approach but before taking that up I wanted to check with the community whether Im doing anything wrong with regular expression. May be I expected too much from the regular expression. Anyway, thanks for your inputs :)


Comment on Re^6: Suggestion for regular expression speed improvement.
Re^7: Suggestion for regular expression speed improvement.
by demerphq (Chancellor) on Jun 15, 2009 at 17:10 UTC

    Well no, its just that if you use a big huge complex machine to do the work that you could do with a knife that you arent being efficient.

    And split does use the regex engine, its just it uses it in special ways to be efficient.

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

      Yes. My initial idea was to keep CSV, RE parsing separate but I thought may be If could get the same performance from RE, then need not to have a CSV parser. But now I understand that is not possible to think of. So, need to switch back to my old approach where I do two parsing separately. So, from the user interface user will have simple/advanced parsing modes. Thanks for your suggestion.

        Dont forget unpack. For fixed width fields its pretty much the fastest choice you have. And many logfiles are fixed width.

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

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://771671]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others making s'mores by the fire in the courtyard of the Monastery: (6)
As of 2015-07-03 00:00 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (47 votes), past polls