There are two things that could be causing the delay. First, your mySQL database might not be optimized well. Take the query that you're sending to the database and have the database analyze it with EXPLAIN. Like:

EXPLAIN SELECT * FROM tablename WHERE ...

If you have a massively large database and are selecting a relatively small number of coordinates to plot, it's possible that the delay might be here. Post the results here, and look into making an index.

The other possibility is that your graphics rendering is just taking too long. This can't really be helped, aside from lowering the number of displayed points (either by ranking each point's importance and only displaying important ones, or by zooming in the map) or getting a more efficient rendering module. You might also look into using CSS layers to display the points, rather than actually generating a graphic for each view. This method won't be quite as compatible, but should take significantly less processing time.

In reply to Re: Debugging script with long exec time by TedPride
in thread Debugging script with long exec time by Baz

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.