I'm just playing with benchmarking,
and realised that require costs
time at runtime, while use does not.

Itis obvious, because use is loaded
in the BEGIN block, and require later, so my
benchmarking does not see it.

Now the question: is use faster ?
(meaning: compile-time AND run-time )
or are they both equal ?

p.s. i am using require to load some
modules on demand (using if-blocks),
that are needed only 10% of the times
the script runs, so it will not have to compile
everything everytime - but maybe i am not right in that ?

so there is a second little question: 

if (1 == 2) {
   require "Foo.pl";
}

[download]
is Foo.pl loaded and compiled here ?

In reply to what's faster: use or require by dreamy

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.