Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight

comment on

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

Here's my tweak of vr's excellent code, for use in the perldl REPL, which doesn't feature the check, just does timing (and doesn't use strict because of the REPL), and uses "+=" instead of the wordier "->inplace->plus":

$n = 2e4; @input = map int rand 1e5, 1 .. $n; $sums = zeroes long, scalar @input; $vec = pdl long, \@input; with_time { my @max = map +($sums( 0 : -$_ - 1 ) += $vec( $_ : -1 ))-> +maximum, 0 .. $#input };
I also increased the $n.

EDIT: in PDL 2.077 with_time is always available in the PDL shells so I removed the definition of it here.

In reply to Re^2: Performance issue in the loop. by etj
in thread Performance issue in the loop. by rsFalse

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others browsing the Monastery: (3)
As of 2022-12-09 06:24 GMT
Find Nodes?
    Voting Booth?

    No recent polls found