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lib/symfony/vendor/phing/system/util/Timer.php

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+<?php
+/*
+ *  $Id: Timer.php 3076 2006-12-18 08:52:12Z fabien $
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information please see
+ * <http://phing.info>.
+ */
+
+
+/**
+ * This class can be used to obtain the execution time of all of the scripts
+ * that are executed in the process of building a page.
+ *
+ * Example:
+ * To be done before any scripts execute:
+ *
+ * $Timer = new Timer;
+ * $Timer->Start_Timer();
+ *
+ * To be done after all scripts have executed:
+ *
+ * $timer->Stop_Timer();
+ * $timer->Get_Elapsed_Time(int number_of_places);
+ *
+ * @author    Charles Killian
+ * @author    Hans Lellelid <hans@xmpl.org>
+ * @package    phing.system.util
+ * @version    $Revision: 1.5 $ $Date: 2003/12/24 13:02:09 $
+ */
+class Timer {
+
+    /** start time */
+    protected $stime;
+    
+    /** end time */
+    protected $etime;  
+
+    /**
+     * This function sets the class variable $stime to the current time in
+     * microseconds.
+     * @return void
+     */
+    public function start() {
+        $this->stime = $this->getMicrotime();
+    }
+
+    /**
+     * This function sets the class variable $etime to the current time in
+     * microseconds.
+     * @return void
+     */
+    function stop() {
+        $this->etime = $this->getMicrotime();
+    }
+    
+    /**
+     * This function returns the elapsed time in seconds.
+     *
+     * Call start_time() at the beginning of script execution and end_time() at
+     * the end of script execution.  Then, call elapsed_time() to obtain the
+     * difference between start_time() and end_time().
+     *
+     * @param    $places  decimal place precision of elapsed time (default is 5)
+     * @return string Properly formatted time.
+     */
+    function getElapsedTime($places=5) {
+        $etime = $this->etime - $this->stime;
+        $format = "%0.".$places."f";
+        return (sprintf ($format, $etime));
+    }
+
+    /**
+     * This function returns the current time in microseconds.
+     *
+     * @author    Everett Michaud, Zend.com
+     * @return    current time in microseconds
+     * @access    private
+     */
+    function getMicrotime() {
+        list($usec, $sec) = explode(" ", microtime());
+        return ((float)$usec + (float)$sec);
+    }
+}