I wrote this all-perl search engine a few months ago one weekend. It's simplistic, but not simple. Basically it uses word-depth directories to store index files, and an index header for relatively quick access of the indexed pages. With a one-word search i benchmarked to about 7520 quieries per second. This is fast, especially since i do not use a database like MySQL. The only problem is that the speed seems to almost fall in half or at least by a third with each added keyword to search for. A 6 word search gives about 3420 queries per second. I was wondering if any of my fellow Monks had worked on search engines in the past, and would be willing to give me a few tips on how to handle multi-word searches and just searches in general? the source code is at http://windstone.darktech.org/~psypete/search_2.pl and although it may be messy it works.
Also, i can see that if my index files were bigger, i might also see a speed impact in searching when the index files are huuge. Of course i could have an index per word, but really, the size of the site indexed would determine the size of the index.

In reply to All-Perl search engine having speed issues by Anonymous Monk

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.