Not a clue as to why, but I agree with chromatic about your benchmark. In general whether prepare is worth doing depends on what you are talking to. The logic is that some databases have a very heavy overhead for setting up a query, which is what prepare does. So, for repetitive queries you suffer the pain once only. However, this isn't true for all databases, and you may only benefit if you have a lot of repetitive queries to work on.

To progress you need a much purer benchmark to test exactly what you plan to do in the real world. This should be on of the last things you do in the course of development. This avoids the curse of Premature optimization!

!-- Node text goes above. Div tags should contain sig only -->
-- Anthony Staines

In reply to Re^2: DBI do vs prepare by astaines
in thread DBI do vs prepare by BrianC

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.