Initial Import
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+<td><h1>Code Igniter User Guide Version 1.4.0</h1></td>
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+<a href="http://www.codeigniter.com/">Code Igniter Home</a> ›
+<a href="../index.html">User Guide Home</a> ›
+Benchmarking Class
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+
+
+<h1>Benchmarking Class</h1>
+
+<p>Code Igniter 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>
+
+<h2>Using the Benchmark</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:
+
+<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>$this->benchmark->mark('start');<br />
+<br />
+// Some code happens here<br />
+<br />
+$this->benchmark->mark('end');<br />
+<br />
+echo $this->benchmark->elapsed_time('start', 'end');</code>
+
+<p><strong>Note:</strong> The words "start" and "end" are arbitrary. They are simply words used to set two markers. You can
+use any words you want, and you can set multiple sets of markers. Consider this example:</p>
+
+<code>$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 $this->benchmark->elapsed_time('dog', 'bird');</code>
+
+
+<h2>Displaying Total Execution Time</h2>
+
+<p>If you would like to display the total elapsed time from the moment Code Igniter starts to the moment the final output
+is sent to the browser, simply place this in one of your view templates:</p>
+
+<code><?=$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, Code Igniter 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>
+
+<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><?=$this->benchmark->memory_usage();?></code>
+<p>Note: This function can only be used in your view files. The consumpiton 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>
+
+
+
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