Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/http-kernel/DataCollector/MemoryDataCollector.php

@@ -0,0 +1,109 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\DataCollector;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+/**
+ * MemoryDataCollector.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class MemoryDataCollector extends DataCollector implements LateDataCollectorInterface
+{
+    public function __construct()
+    {
+        $this->data = array(
+            'memory' => 0,
+            'memory_limit' => $this->convertToBytes(ini_get('memory_limit')),
+        );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function collect(Request $request, Response $response, \Exception $exception = null)
+    {
+        $this->updateMemoryUsage();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function lateCollect()
+    {
+        $this->updateMemoryUsage();
+    }
+
+    /**
+     * Gets the memory.
+     *
+     * @return int The memory
+     */
+    public function getMemory()
+    {
+        return $this->data['memory'];
+    }
+
+    /**
+     * Gets the PHP memory limit.
+     *
+     * @return int The memory limit
+     */
+    public function getMemoryLimit()
+    {
+        return $this->data['memory_limit'];
+    }
+
+    /**
+     * Updates the memory usage data.
+     */
+    public function updateMemoryUsage()
+    {
+        $this->data['memory'] = memory_get_peak_usage(true);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'memory';
+    }
+
+    private function convertToBytes($memoryLimit)
+    {
+        if ('-1' === $memoryLimit) {
+            return -1;
+        }
+
+        $memoryLimit = strtolower($memoryLimit);
+        $max = strtolower(ltrim($memoryLimit, '+'));
+        if (0 === strpos($max, '0x')) {
+            $max = intval($max, 16);
+        } elseif (0 === strpos($max, '0')) {
+            $max = intval($max, 8);
+        } else {
+            $max = (int) $max;
+        }
+
+        switch (substr($memoryLimit, -1)) {
+            case 't': $max *= 1024;
+            case 'g': $max *= 1024;
+            case 'm': $max *= 1024;
+            case 'k': $max *= 1024;
+        }
+
+        return $max;
+    }
+}