<?php

use Drupal\Component\Utility\Html;
use Drupal\Core\DrupalKernel;
use Symfony\Component\HttpFoundation\Request;

// Boot the environment.
$autoloader = require_once 'autoload.php';
$request = Request::createFromGlobals();
$kernel = DrupalKernel::createFromRequest($request, $autoloader, 'prod');
$kernel->boot();
$kernel->preHandle($request);

// Create test values.
$arr = array_fill(0,20, 'lorem ipsum' . mt_rand(0, 99999999999));
$twig_render_array = ['#theme' => 'inline_list', '#items' => $arr];
$markup_render_array = ['#separator' => ', ', '#markup' => $arr];

// Do an unrelated render to set up stuff...
$renderer = \Drupal::service('renderer');
$markup = ['#markup' => 'ignore'];
$renderer->renderPlain($markup);

$tests = 10;

for ($i=0; $i<$tests; $i++) {
  $arr[$i] = array_fill(0, 20, 'lorem ipsum' . mt_rand(0, 99999999999));
}

// Test twig template.
$time_start = microtime(true);
for ($i=0; $i<$tests; $i++) {
  $twig_render_array = ['#theme' => 'inline_list', '#items' => $arr[$i]];
  $renderer->renderPlain($twig_render_array);
}
$time_end = microtime(true);
$time = $time_end - $time_start;
echo "Twig render array in $time seconds\n";

// Test #markup.
$time_start = microtime(true);
for ($i=0; $i<$tests; $i++) {
  $markup_render_array = ['#separator' => ', ', '#markup' => $arr[$i], '#safe_strategy' => \Drupal\Core\Render\Element\Markup::SAFE_STRATEGY_ESCAPE];
  $renderer->renderPlain($markup_render_array);
}
$time_end = microtime(true);
$time = $time_end - $time_start;
echo "#markup render array in $time seconds\n";