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

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??

This may work (I haven't tested it):

use Time::HiRes qw( ualarm tv_interval gettimeofday ); my $ua = LWP::UserAgent->new; my $fastest = undef; MIRROR: foreach my $mirror ( @mirrors ) { my $url = "$mirror/file.tar.bz2"; my $request = HTTP::Request->new(HEAD => $url); # if we have a possible fastest mirror, set an alarm ualarm( $fastest->{response_time} * 1_000_000 ) if defined $fastest; # attempt to fetch from this mirror in less time # than the fastest so far my ( $start_time, $response ); eval { local $SIG{ALRM} = sub { die 'alarm' }; $start_time = [gettimeofday]; $response = $ua->request($request); ualarm( 0 ); }; # if the alarm went off (or some other error), # try next mirror next MIRROR if $@; my $response_time = tv_interval( $start_time ); my $status = $response->status_line; # if this was successful, if ( $status == 200 ) { # if we haven't found a fast mirror yet, # or this one's faster, if ( ! defined $fastest || $fastest->{response_time} > $response_time ) { # store this one as the fastest $fastest = { mirror => $mirror, response_time => $response_time }; } } }

What's nice about this:

  • No forking.
  • If I've found a live site, I never wait for a dead one. In fact, I never wait for a site slower than the fastest one I've seen.
  • The $fastest that I find is a hash ref, so I can stash more info (such as the actual response) in there later, if I want.

I don't know how netselect works, so I can't speak to how well this works by comparison. I just hope to give you a good starting point.


In reply to Re: Selecting the "fastest" server listed in an array by kyle
in thread Selecting the "fastest" server listed in an array by hacker

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 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?Last hourOther CB clients
Other Users?
Others learning in the Monastery: (6)
As of 2024-04-20 02:30 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found