The speedup you might get for not supporting threads very much depends on your compiler, your OS, your OS thread support (Linux, Windos, VMS, z/OS, HP-UX, AIX, …) and the configuration of your perl. There is no single number that can be pinned to how much slower/faster perl will be (runtime) when built with/without a configuration option.

For the systems I run a smoke-test on, the gain for non-threaded perl is about

See https://tux.nl/perl5/smoke/index.html for smoke results, and a summary at the page bottom regarding performance differences:

threaded   is   6.1% slower than non-threaded
DEBUGGING  is   2.5% slower than non-DEBUGGING
gcc/g++    is  29.7% slower than cc              (cc vs. gcc on non-Li
+nux and gcc vs. g++ on Linux combined)
stdio      is   8.5% slower than perlio

[download]

Enjoy, Have FUN! H.Merijn

In reply to Re^3: Trading compile time for faster runtime? by Tux
in thread Trading compile time for faster runtime? by melez

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.