I'm trying to speed up communication to a bunch of WHOIS servers by using IO::Select - the theory being that it is better to make 100 queries and then sit around for the results, than to make each query one by one and wait for each result sequentially. But instead of speeding up, my code is timing out the web server! I must be doing something dumb, but I can't figure out what.

Here's the stuff:

# create a nice  IO::Select object with a bunch of sockets... then
while ( my @ready = $select->can_read(30) ) {
  foreach (@ready) {
   my $result = sysread($_, $domains{$_}[2], 128$domains{$_}[3]); # do
+mains is just a local data structure where elements [2] and [3] are t
+he WHOIS results returned so far, and the offset
   unless (defined $result){
    $domains{$_}[0]{result} = "no_connect";
    $select -> remove($_);
    $_->close;
    next;
   };
    if ( $domains{$_}[2] =~ /$domains{$_}[1]/  ) {
    $domains{$_}[0]{result} = "avail";
    $select -> remove($_);
    $_->close;
    next;
   }
   unless ($result) {
    $domains{$_}[0]{result} = "unav";
    $select -> remove($_);
    $_->close;
    next;
   }

   $domains{$_}[3] += $result;
  }

  foreach ($select -> has_exception ) {
   $select->remove($_);
   $_->close;
  };
 }

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Am I being stupid in mixing sysreads with IO::Selects? Or not checking for something obvious?

Thanks

dave hj~

In reply to slow, slow IO::Select by dash2

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