If you have not done so already, I would suggest you use Devel::NYTProf to identify where all the slow points are in your code. It will save a lot of guesswork, and there might be other parts of your codebase you had not thought of as causing bottlenecks.

In terms of the example code you gave, I have not used Win32::OLE, but I/O can often be a bottleneck in code. Is it possible to avoid repeated reading and writing of the file? i.e., read as much as you can in batch mode (a data range), update it in perl, and then write it back in one go? That said, you should run your code through Devel::NYTProf to make sure this is the case before you do any editing, and keep track of the timing changes to see if it makes a meaningful difference.

In reply to Re: Increase speed of nested loop Win32 Excel Manipulation by swl
in thread Increase speed of nested loop Win32 Excel Manipulation by Sasuke300

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.