Ok, what would you have me benchmark? Why don't you do it yourself?

Update:
If you need access to a complete hash, it is completely clear that returning a reference to a hash which has been created already is much more efficient than causing the hash to be re-created from a list. If you claim that is not true, then you need to provide some benchmarks yourself! That duck just doesn't fly.

I guess we are talking about returning ONLY the keys from a hash table, that which is created in a sub? Or what? The sub can make a list of those keys itself or it can pass a ref to its internal hash for the calling sub to do the same. That computational effort will be similar.

What are you talking about? What kind of benchmark do you propose?

In reply to Re^5: Using 'keys' on a list by Marshall
in thread Using 'keys' on a list by lammey

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.