added small script to test PDO performance for data aggregation

share/tests/pdobench.php

@@ -0,0 +1,48 @@
+<?php
+/**
+ * @package tests
+ * @copyright Copyright (c) 2010, The volkszaehler.org project
+ * @license http://www.gnu.org/licenses/gpl.txt GNU Public License
+ */
+/*
+ * This file is part of volkzaehler.org
+ *
+ * volkzaehler.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * volkzaehler.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with volkszaehler.org. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+$start = microtime(true);
+
+$dbh = new PDO('mysql:host=localhost;dbname=volkszaehler', 'vz', 'demo');
+
+$attr = array();
+$attr[PDO::ATTR_CURSOR] = PDO::CURSOR_SCROLL;
+
+$stmt = $dbh->prepare('SELECT timestamp, value FROM data LEFT JOIN channels ON data.channel_id = channels.id WHERE channels.indicator = \'temperature\'', $attr);
+
+for ($i = 0; $i < 1000; $i++) {
+
+	$stmt->execute();
+	$stmt->setFetchMode(PDO::FETCH_ASSOC);
+
+	$c = 0;
+	foreach($stmt as $row) {
+	}
+
+}
+
+echo $stmt->rowCount() . '<br />';
+
+echo 'time: ' . round(microtime(true) - $start, 6);
+
+?>