SymfonyProgressBarDelay.php

<?php
/**
 * ProgressBar.php
 * 
 * Extension of Symfony's ProgressBar to limit redraw's to a minimum time
 */

namespace App\Lib;

use Symfony\Component\Console\Helper\ProgressBar as SymfonyProgressBar;
use Symfony\Component\Console\Output\OutputInterface;

class ProgressBar extends SymfonyProgressBar
{
    protected $delay, $lastDraw;
    
    /**
     * @param OutputInterface $output An OutputInterface instance
     * @param int             $max    Maximum steps (0 if unknown)
     */
    public function __construct(OutputInterface $output, $max = 0)
    {
        parent::__construct($output, $max);
        $this->delay = null;
    }
    
    /**
     * @param $ms
     */
    public function setRedrawDelay($ms)
    {
        $this->delay = $ms;
        $this->setRedrawFrequency(1);
    }

    /**
     * 
     */
    public function display()
    {
        if($this->delay) {
            $elapsed = round(microtime(true) - $this->lastDraw, 3)*1000;
            if ($elapsed < $this->delay && $this->getMaxSteps() !== $this->getProgress()) {
                return;
            }
        }
        $this->lastDraw = microtime(true);
        parent::display();
    }
}