print does IO by way of a system call, which means that you have at least one context switch into kernel mode (to perform the system call) and one context switch out of kernel mode (to return control to the process running perl), and it's likely a blocking system call, so the minor difference between pushing a couple of arguments onto the stack and making a sub call in Perl is mostly immaterial. Besides that, an important question is how often $flag is true, or how often FUNC() gets called, or if this is anywhere near a critical loop in your program (though I have confidence that it's not).

In other words, don't worry about this code. It's not likely to matter, even if you could measure it without taking into account the system call.

In reply to Re: How to select the code on basis of memory usage and execution time. by chromatic
in thread How to select the code on basis of memory usage and execution time. by Rapunzel

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.