Hi Discipulus,

Thanks for your suggestions.

I have now done three changes to reduce the time taken.

1. Precompiled the regex and used them. This reduced the time taken from ~30 minutes to ~15 minutes. 2. Changed foreach loops to while loops 3. I managed to find the lines in input file which were responsible for longer runtime. I skipped parsing those lines, after confirming that they are not required. These lines were common in most of the input files.

After all this, time to run has come down from ~30 minutes to ~35 seconds.

A huge, huge, huge improvement.

Solving this issue has gotten me more interested in perl. Cant thank you enough for your help!

In reply to Re^8: Using regex with a variable by Praveen Dharmaraj
in thread Using regex with a variable by Praveen Dharmaraj

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.