Picking your syntax based on benchmarks of trivial operations is total folly.

Use map if you want to get back a list. Don't otherwise.

Now, there can be non-trivial performance implications in similar syntax choices between for() and while() when reading from a (large) file, for example. But you also likely would not discover those from running benchmarks of trivial operations.

The benchmark results presented so far mostly illustrate differences in the trivial operations being done, not any performance difference that is likely to actually matter if you were changing useful code between map/for() [for cases of code where for() made sense].

- tye        


In reply to Re: map vs for\foreach. (perf) by tye
in thread map vs for\foreach. by builat

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.