Beefy Boxes and Bandwidth Generously Provided by pair Networks
Don't ask to ask, just ask
 
PerlMonks  

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

The answer is always going to be: It depends. Upon many things including what you subsequently do with the variables.

One trivial test each of ''. and 0+ shows that in these particular cases, the former costs little, and the latter saves a lot:

cmpthese -1,{ a => q[ my $s = join '', map ''.$_, 1 .. 1e5 ], b => q[ my $s = join '', map $_, 1 .. 1e5 ], };; Rate a b a 12.3/s -- -18% b 14.9/s 21% -- cmpthese -1,{ a => q[ my $s = sum map 0+$_, '0001' .. '1000'], b => q[ my $s = sum map $_, '0001' .. '1000'], };; Rate b a b 1452/s -- -76% a 6056/s 317% --

I guess whether you think either or both are important will depend upon whether your programs spend most of their time sitting around waiting for someone to click something, or doing real work :)


With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re: forcing contexts and micro-efficiency by BrowserUk
in thread forcing contexts and micro-efficiency by TomDLux

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, 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, 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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others about the Monastery: (6)
    As of 2018-05-24 14:45 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Notices?