#!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11140461
use warnings;
use Time::HiRes qw( sleep );
use IO::Select;

my $interval = 1; # FIXME for testing
my $pricing = '';
my $sel = IO::Select->new;
my $time = time;
my $loopcount = 0;

while( 1 )
  {
  if( $sel->count )
    {
    for my $fh ( $sel->can_read(0) )
      {
      if( not sysread $fh, $pricing, 16384, length $pricing )
        {
        $sel->remove( $fh );
        # FIXME process data
        print "\nbuffer : $pricing at loop count $loopcount\n";
        $time = time + $interval;
        }
      }
    }
  elsif( time >= $time )
    {
    if( open my $fh, '-|' )
      {
      $sel->add( $fh );
      $pricing = '';
      }
    else
      {
      sleep 0.7; # FIXME fake net::curl delay time
      print "fake data\n";
      exit;
      }
    }
  # hard loop
  print ++$loopcount, "\r";
  }

[download]

In reply to Re: making a loop script with a remote URL call faster by tybalt89
in thread making a loop script with a remote URL call faster by brandonm78

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.