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31 <td><h1>CodeIgniter User Guide Version 2.0.2</h1></td>
32 <td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
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43 <a href="http://codeigniter.com/">CodeIgniter Home</a> &nbsp;&#8250;&nbsp;
44 <a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
45 Profiling Your Application
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57
58
59 <h1>Profiling Your Application</h1>
60
61 <p>The Profiler Class will display benchmark results, queries you have run, and $_POST data at the bottom of your pages.
62 This information can be useful during development in order to help with debugging and optimization.</p>
63
64
65 <h2>Initializing the Class</h2>
66
67 <p class="important"><strong>Important:</strong>&nbsp; This class does <kbd>NOT</kbd> need to be initialized. It is loaded automatically by the
68 <a href="../libraries/output.html">Output Class</a> if profiling is enabled as shown below.</p>
69
70 <h2>Enabling the Profiler</h2>
71
72         <p>To enable the profiler place the following function anywhere within your <a href="controllers.html">Controller</a> functions:</p>
73         <code>$this->output->enable_profiler(TRUE);</code>
74
75         <p>When enabled a report will be generated and inserted at the bottom of your pages.</p>
76
77         <p>To disable the profiler you will use:</p>
78         <code>$this->output->enable_profiler(FALSE);</code>
79
80
81 <h2>Setting Benchmark Points</h2>
82
83         <p>In order for the Profiler to compile and display your benchmark data you must name your mark points using specific syntax.</p>
84
85         <p>Please read the information on setting Benchmark points in <a href="../libraries/benchmark.html">Benchmark Class</a> page.</p>
86
87
88 <h2>Enabling and Disabling Profiler Sections</h2>
89
90         <p>Each section of Profiler data can be enabled or disabled by setting a corresponding config variable to <var>TRUE</var> or <var>FALSE</var>.  This can be done one of two ways.  First, you can set application wide defaults with the <dfn>application/config/profiler.php</dfn> config file.</p>
91
92         <code>$config['config']&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;= FALSE;<br />
93         $config['queries']&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;= FALSE;<br /></code>
94
95         <p>In your controllers, you can override the defaults and config file values by calling the <kbd>set_profiler_sections()</kbd> method of the <a href="../libraries/output.html">Output class</a>:</p>
96
97         <code>$sections = array(<br />
98         &nbsp;&nbsp;&nbsp;&nbsp;'config' &nbsp;=> TRUE,<br />
99         &nbsp;&nbsp;&nbsp;&nbsp;'queries' => TRUE<br />
100         &nbsp;&nbsp;&nbsp;&nbsp;);<br />
101         <br />
102         $this->output->set_profiler_sections($sections);</code>
103
104         <p>Available sections and the array key used to access them are described in the table below.</p>
105
106         <table cellpadding="0" cellspacing="1" border="0" style="width:100%" class="tableborder">
107                 <tr>
108                 <th>Key</th>
109                 <th>Description</th>
110                 <th>Default</th>
111                 </tr><tr>
112
113                 <td class="td"><strong>benchmarks</strong></td>
114                 <td class="td">Elapsed time of Benchmark points and total execution time</td>
115                 <td class="td">TRUE</td>
116                 </tr><tr>
117
118                 <td class="td"><strong>config</strong></td>
119                 <td class="td">CodeIgniter Config variables</td>
120                 <td class="td">TRUE</td>
121                 </tr><tr>
122
123                 <td class="td"><strong>controller_info</strong></td>
124                 <td class="td">The Controller class and method requested</td>
125                 <td class="td">TRUE</td>
126                 </tr><tr>
127
128                 <td class="td"><strong>get</strong></td>
129                 <td class="td">Any GET data passed in the request</td>
130                 <td class="td">TRUE</td>
131                 </tr><tr>
132
133                 <td class="td"><strong>http_headers</strong></td>
134                 <td class="td">The HTTP headers for the current request</td>
135                 <td class="td">TRUE</td>
136                 </tr><tr>
137
138                 <td class="td"><strong>memory_usage</strong></td>
139                 <td class="td">Amount of memory consumed by the current request, in bytes</td>
140                 <td class="td">TRUE</td>
141                 </tr><tr>
142
143                 <td class="td"><strong>post</strong></td>
144                 <td class="td">Any POST data passed in the request</td>
145                 <td class="td">TRUE</td>
146                 </tr><tr>
147
148                 <td class="td"><strong>queries</strong></td>
149                 <td class="td">Listing of all database queries executed, including execution time</td>
150                 <td class="td">TRUE</td>
151                 </tr><tr>
152
153                 <td class="td"><strong>uri_string</strong></td>
154                 <td class="td">The URI of the current request</td>
155                 <td class="td">TRUE</td>
156                 </tr><tr>
157         </table>
158
159
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