198 lines
7.6 KiB
HTML
198 lines
7.6 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
|
<head>
|
|
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<title>Benchmarking Class : CodeIgniter User Guide</title>
|
|
|
|
<style type='text/css' media='all'>@import url('../userguide.css');</style>
|
|
<link rel='stylesheet' type='text/css' media='all' href='../userguide.css' />
|
|
|
|
<script type="text/javascript" src="../nav/nav.js"></script>
|
|
<script type="text/javascript" src="../nav/prototype.lite.js"></script>
|
|
<script type="text/javascript" src="../nav/moo.fx.js"></script>
|
|
<script type="text/javascript" src="../nav/user_guide_menu.js"></script>
|
|
|
|
<meta http-equiv='expires' content='-1' />
|
|
<meta http-equiv= 'pragma' content='no-cache' />
|
|
<meta name='robots' content='all' />
|
|
<meta name='author' content='ExpressionEngine Dev Team' />
|
|
<meta name='description' content='CodeIgniter User Guide' />
|
|
|
|
</head>
|
|
<body>
|
|
|
|
<!-- START NAVIGATION -->
|
|
<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div>
|
|
<div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle_darker.jpg" width="154" height="43" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div>
|
|
<div id="masthead">
|
|
<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
|
|
<tr>
|
|
<td><h1>CodeIgniter User Guide Version 2.1.3</h1></td>
|
|
<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<!-- END NAVIGATION -->
|
|
|
|
|
|
<!-- START BREADCRUMB -->
|
|
<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
|
|
<tr>
|
|
<td id="breadcrumb">
|
|
<a href="http://codeigniter.com/">CodeIgniter Home</a> ›
|
|
<a href="../index.html">User Guide Home</a> ›
|
|
Benchmarking Class
|
|
</td>
|
|
<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="codeigniter.com/user_guide/" />Search User Guide <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td>
|
|
</tr>
|
|
</table>
|
|
<!-- END BREADCRUMB -->
|
|
|
|
<br clear="all" />
|
|
|
|
|
|
<!-- START CONTENT -->
|
|
<div id="content">
|
|
|
|
|
|
<h1>Benchmarking Class</h1>
|
|
|
|
<p>CodeIgniter has a Benchmarking class that is always active, enabling the time difference between any
|
|
two marked points to be calculated.</p>
|
|
|
|
<p class="important"><strong>Note:</strong> This class is initialized automatically by the system so there is no need to do it manually.</p>
|
|
|
|
|
|
<p>In addition, the benchmark is always started the moment the framework is
|
|
invoked, and ended by the output class right before sending the final view to the browser, enabling a very accurate
|
|
timing of the entire system execution to be shown.</p>
|
|
|
|
|
|
<h3>Table of Contents</h3>
|
|
|
|
<ul>
|
|
<li><a href="#using">Using the Benchmark Class</a></li>
|
|
<li><a href="#profiler">Profiling Your Benchmark Points</a></li>
|
|
<li><a href="#execution">Displaying Total Execution Time</a></li>
|
|
<li><a href="#memory">Displaying Memory Consumption</a></li>
|
|
</ul>
|
|
|
|
|
|
|
|
<a name="using"></a>
|
|
<h2>Using the Benchmark Class</h2>
|
|
|
|
<p>The Benchmark class can be used within your <a href="../general/controllers.html">controllers</a>, <a href="../general/views.html">views</a>, or your <a href="../general/models.html">models</a>. The process for usage is this:</p>
|
|
|
|
<ol>
|
|
<li>Mark a start point</li>
|
|
<li>Mark an end point</li>
|
|
<li>Run the "elapsed time" function to view the results</li>
|
|
</ol>
|
|
|
|
<p>Here's an example using real code:</p>
|
|
|
|
<code>$this->benchmark->mark('code_start');<br />
|
|
<br />
|
|
// Some code happens here<br />
|
|
<br />
|
|
$this->benchmark->mark('code_end');<br />
|
|
<br />
|
|
echo $this->benchmark->elapsed_time('code_start', 'code_end');</code>
|
|
|
|
<p class="important"><strong>Note:</strong> The words "code_start" and "code_end" are arbitrary. They are simply words used to set two markers. You can
|
|
use any words you want, and you can set multiple sets of markers. Consider this example:</p>
|
|
|
|
<code>$this->benchmark->mark('dog');<br />
|
|
<br />
|
|
// Some code happens here<br />
|
|
<br />
|
|
$this->benchmark->mark('cat');<br />
|
|
<br />
|
|
// More code happens here<br />
|
|
<br />
|
|
$this->benchmark->mark('bird');<br />
|
|
<br />
|
|
echo $this->benchmark->elapsed_time('dog', 'cat');<br />
|
|
echo $this->benchmark->elapsed_time('cat', 'bird');<br />
|
|
echo $this->benchmark->elapsed_time('dog', 'bird');</code>
|
|
|
|
|
|
<a name="profiler"></a>
|
|
<h2>Profiling Your Benchmark Points</h2>
|
|
|
|
<p>If you want your benchmark data to be available to the
|
|
<a href="../general/profiling.html">Profiler</a> all of your marked points must be set up in pairs, and
|
|
each mark point name must end with <kbd>_start</kbd> and <kbd>_end</kbd>.
|
|
Each pair of points must otherwise be named identically. Example:</p>
|
|
|
|
<code>
|
|
$this->benchmark->mark('my_mark<kbd>_start</kbd>');<br />
|
|
<br />
|
|
// Some code happens here...<br />
|
|
<br />
|
|
$this->benchmark->mark('my_mark<kbd>_end</kbd>');
|
|
<br /><br />
|
|
|
|
$this->benchmark->mark('another_mark<kbd>_start</kbd>');<br />
|
|
<br />
|
|
// Some more code happens here...<br />
|
|
<br />
|
|
$this->benchmark->mark('another_mark<kbd>_end</kbd>');
|
|
</code>
|
|
|
|
<p>Please read the <a href="../general/profiling.html">Profiler page</a> for more information.</p>
|
|
|
|
|
|
<a name="execution"></a>
|
|
<h2>Displaying Total Execution Time</h2>
|
|
|
|
<p>If you would like to display the total elapsed time from the moment CodeIgniter starts to the moment the final output
|
|
is sent to the browser, simply place this in one of your view templates:</p>
|
|
|
|
<code><?php echo $this->benchmark->elapsed_time();?></code>
|
|
|
|
<p>You'll notice that it's the same function used in the examples above to calculate the time between two point, except you are
|
|
<strong>not</strong> using any parameters. When the parameters are absent, CodeIgniter does not stop the benchmark until right before the final
|
|
output is sent to the browser. It doesn't matter where you use the function call, the timer will continue to run until the very end.</p>
|
|
|
|
<p>An alternate way to show your elapsed time in your view files is to use this pseudo-variable, if you prefer not to use the pure PHP:</p>
|
|
<code>{elapsed_time}</code>
|
|
|
|
<p class="important"><strong>Note:</strong> If you want to benchmark anything within your controller
|
|
functions you must set your own start/end points.</p>
|
|
|
|
<a name="memory"></a>
|
|
<h2>Displaying Memory Consumption</h2>
|
|
|
|
<p>If your PHP installation is configured with --enable-memory-limit, you can display the amount of memory consumed by the entire
|
|
system using the following code in one of your view file:</p>
|
|
|
|
<code><?php echo $this->benchmark->memory_usage();?></code>
|
|
<p>Note: This function can only be used in your view files. The consumption will reflect the total memory used by the entire app.</p>
|
|
|
|
<p>An alternate way to show your memory usage in your view files is to use this pseudo-variable, if you prefer not to use the pure PHP:</p>
|
|
<code>{memory_usage}</code>
|
|
|
|
|
|
|
|
|
|
</div>
|
|
<!-- END CONTENT -->
|
|
|
|
|
|
|
|
<div id="footer">
|
|
<p>
|
|
Previous Topic: <a href="../doc_style/index.html">Writing Documentaion</a>
|
|
·
|
|
<a href="#top">Top of Page</a> ·
|
|
<a href="../index.html">User Guide Home</a> ·
|
|
Next Topic: <a href="calendar.html">Calendar Class</a>
|
|
</p>
|
|
<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006 - 2012 · <a href="http://ellislab.com/">EllisLab, Inc.</a></p>
|
|
</div>
|
|
|
|
</body>
|
|
</html> |