Beefy Boxes and Bandwidth Generously Provided by pair Networks
good chemistry is complicated,
and a little bit messy -LW
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??

...in O(n log n) time per handle fetch (if I'm reading the code right).

The module seems to implement a Least Frequently Used cache (though it calls it Least Recently Used cache), and does so by incrementing and re-sorting on each request for a handle. And then there's this: "The module functionality relies on symbolic references, so things will break under 'use strict' unless 'no strict "refs"' is also specified." So the only way to use the module is to wrap the code that uses it in a scope block and specify no strict 'refs'; for that block. Talk about the implementation leaking outward into the interface!

It's hard to believe it's still in the core.

I think that a Fibonacci Heap solution would work nicely. Inserts (adding a handle) are constant time, remove least (dropping a seldom-used handle) is O(log n) time, change priority (calling for a handle and incrementing its use count) is a delete+insert (O(log n)). Of course the devil is in the details. If I find some free time I might give it a go and see how it works out.


Dave


In reply to Re^5: Split a file based on column by davido
in thread Split a file based on column by brad_nov

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



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

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

    How do I use this? | Other CB clients
    Other Users?
    Others imbibing at the Monastery: (9)
    As of 2014-12-27 02:26 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      Is guessing a good strategy for surviving in the IT business?





      Results (176 votes), past polls