Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
It worked fine up to its planned limit of around 3000 files, but it's been too successful and the client now has 17,000 files in there!

A side note first: Some operating systems are really, really bad with directories that large. If your client is interested in performance, they (or you, on their behalf) may want to do a bit of performance prototyping. Recent work on FreeBSD has greatly improved its large directory performance, for whatever that's worth.

For your problem, I see two options: The first is to use File::Find to locate all *.txt files, and process them one-by-one. The second is to use opendir()/readdir()/closedir() to read the directory directly, filename by filename. Either one will avoid you having to hold on to a large temporary array.

You can find plenty of examples of each by using Super Search to look for "File::Find" or "opendir".


In reply to Re: Efficient processing of large directory by dws
in thread Efficient processing of large directory by Elliott

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
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            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: (7)
    As of 2015-07-07 05:08 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 (87 votes), past polls