I also like curlies around the grep block

Without curlies, it is not a block. The non-block version of grep is much faster. 

2;0 juerd@ouranos:~$ perl -MBenchmark=cmpthese -e'cmpthese(-1, { block
+ => sub { grep { /[13579]/ } 0..9 }, nonblock => sub { grep /[13579]/
+, 0..9 } })'

[download]
Benchmark: running block, nonblock, each for at least 1 CPU seconds...
     block:  2 wallclock secs ( 1.06 usr +  0.00 sys =  1.06 CPU) @ 44436.79/s (n=47103)
  nonblock:  0 wallclock secs ( 1.01 usr +  0.00 sys =  1.01 CPU) @ 141940.59/s (n=143360)
             Rate    block nonblock
block     44437/s       --     -69%
nonblock 141941/s     219%       --


- Yes, I reinvent wheels.
- Spam: Visit eurotraQ.

In reply to Re: Re: Re: Everything BUT by Juerd
in thread Everything BUT by Cockneyphil

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.