Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister
 
PerlMonks  

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??

Well there are two reasons why I wouldnt do it this way. The first is that doing this afaict adds a high cost to compiling regexes in the scope where the overload takes effect. The second is that special metasequences like we are discussing can be handled much more efficiently by the regex engine. So for instance a NEOL regop would be a lot more efficient both in terms of storage and execution than the ANYOF regop that [^\n] is converted to.

The ANYOF is implemented by a bitmap lookup with flags, meaning it requires more than 32 bytes to represent, and for each character inspected requires a set of bit shifting to do the correct bitmap test. Wheras an NEOL regop would be much faster as it would essentially be a straight character inequality test. Also an NEOL regop would be just 4 bytes iirc.

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


In reply to Re^5: Best practice or cargo cult? by demerphq
in thread Best practice or cargo cult? by robinbowes

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others lurking in the Monastery: (5)
As of 2024-03-19 02:53 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found