Hello Dear Monks

in my script i am using a grep against each element in the array. this array containts around 8000 elements now and processing of each element is taking much time. this causes an script timeout on my remote system from where i execute this script. i am wondering if there is a way to improve the performance time? Below are the snippet of the code in question

my $path = "/tmp/testpatch"; opendir DIR, $path or die $!; my @tempfiles = readdir DIR; #this array has list of all the files, p +reviously processed and newly added (8000 files) closedir DIR; foreach my $strfile (@tempfiles) { if (!grep /$strfile/, @arraytocompare) #This array has list of files w +hich were processed in the passed { push (@newarray, $strfile); # in this array i get all the new files wh +ich i need to process now. } }

is there a fast grep? or i will have to live with it?


In reply to improve performance by swissknife

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!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • 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, details, 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, summary, 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.