Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses
 
PerlMonks  

comment on

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

In a way, it's useful to look at the various OS implementation of threads. Take, for example, Linux - not POSIX-compatible threads, but near enough. But, they're implemented pretty much as fork()s - that's where the non-POSIX-compatibility comes from (or, at least, the most part).

So, what you're actually doing is comparing the management of fork()s. fork(), especially when COW, is extremely lightweight, the main cost being the task switch and the increased complexity in scheduling.

Threading is, therefore, unlikely to gain much in terms of "raw speed". What it might gain, though, is increased readability of code - it's very obvious to see the thread of execution of a master thread, whereas following the various parents of fork()s is not always obvious. And, of course, on non-Unix derived OSes (Windows) threads may actually be quite a win, presuming that they are implemented fairly natively. My personal feeling, though, would be go with what makes the code work out best - if it's easier to understand with threads (esp. working with ex-Java/C++ programmers), that might be the best route.


In reply to Re: Status and usefulness of ithreads in 5.8.0 by kal
in thread Status and usefulness of ithreads in 5.8.0 by BazB

Title:
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 or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

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

How do I use this? | Other CB clients
Other Users?
Others having an uproarious good time at the Monastery: (9)
As of 2021-10-26 15:37 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    My first memorable Perl project was:







    Results (90 votes). Check out past polls.

    Notices?