Databases are effective in this case because they understand the importance of streaming data to/from disk rather than using it as RAM. As for why, see Re^2: Memory Efficient Alternatives to Hash of Array. However it is fairly easy for you to acquire the same knowledge, which basically comes down to knowing to sort then process. Armed with that knowledge, the database slows me down slightly for simple tasks. For complex tasks, the database saves some logic but may come up with an unworkable query plan. I'll therefore give it a try, but push comes to shove I'm willing to go out of the database because I know that I can make it work, and sometimes the database simply won't.

In reply to Re^2: Memory Efficient Alternatives to Hash of Array by tilly
in thread Memory Efficient Alternatives to Hash of Array by neversaint

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.