The issue the OP experienced was not with the Windows PRNG, but with the PRNG built into Perl. They are quite different animals. The Perl PRNG is a 16 bit primitive PRNG that has been provided by MicroSoft's C run time for pretty much ever. It has long been recognised as a very flawed (some would say 'useless') PRNG, but much code has been written using it that would probably break if it were changed. If you have a serious need for a good PRNG for some application there are plenty of libraries around that will supply the need for various appropriate definitions of 'good'.

To a fairly large extent there is not a great deal of point in a compiler supplying a 'good' PRNG because there are many areas of compromise in the definition of good for any particular application. Anyone with a serious application for a PRNG will most likely either develop their own, or use library code developed for a similar application.

True laziness is hard work

In reply to Re^2: Random numbers are not random enough on Windows by GrandFather
in thread Random numbers are not random enough on Windows by kikuchiyo

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.