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diff --git a/user_guide/libraries/benchmark.html b/user_guide/libraries/benchmark.html new file mode 100644 index 000000000..8bfc6488d --- /dev/null +++ b/user_guide/libraries/benchmark.html @@ -0,0 +1,703 @@ + + +<!DOCTYPE html> +<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> +<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1.0"> + + <title>Benchmarking Class — CodeIgniter 3.1.8 documentation</title> + + + + + <link rel="shortcut icon" href="../_static/ci-icon.ico"/> + + + + <link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'> + + + + + + + + + + <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" /> + + + + <link rel="index" title="Index" + href="../genindex.html"/> + <link rel="search" 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Applications</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li> +</ul> +</li> +</ul> +<ul class="current"> +<li class="toctree-l1 current"><a class="reference internal" href="index.html">Libraries</a><ul class="current"> +<li class="toctree-l2 current"><a class="current reference internal" href="#">Benchmarking Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="caching.html">Caching Driver</a></li> +<li class="toctree-l2"><a class="reference internal" href="calendar.html">Calendaring Class</a></li> +<li class="toctree-l2"><a 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Function Calls</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li> +</ul> +</li> +</ul> +<ul> +<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li> +<li 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class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li> +</ul> +</li> +</ul> + + + + </div> + + </nav> + + <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> + + + <nav class="wy-nav-top" role="navigation" aria-label="top navigation"> + <i data-toggle="wy-nav-top" class="fa fa-bars"></i> + <a href="../index.html">CodeIgniter</a> + </nav> + + + + <div class="wy-nav-content"> + <div class="rst-content"> + <div role="navigation" aria-label="breadcrumbs navigation"> + <ul class="wy-breadcrumbs"> + <li><a href="../index.html">Docs</a> »</li> + + <li><a href="index.html">Libraries</a> »</li> + + <li>Benchmarking Class</li> + <li class="wy-breadcrumbs-aside"> + + </li> + <div style="float:right;margin-left:5px;" id="closeMe"> + <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" /> + </div> + </ul> + <hr/> +</div> + <div role="main" class="document"> + + <div class="section" id="benchmarking-class"> +<h1>Benchmarking Class<a class="headerlink" href="#benchmarking-class" title="Permalink to this headline">¶</a></h1> +<p>CodeIgniter has a Benchmarking class that is always active, enabling the +time difference between any two marked points to be calculated.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">This class is initialized automatically by the system so there +is no need to do it manually.</p> +</div> +<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> +<div class="contents local topic" id="contents"> +<ul class="simple"> +<li><a class="reference internal" href="#using-the-benchmark-class" id="id1">Using the Benchmark Class</a><ul> +<li><a class="reference internal" href="#profiling-your-benchmark-points" id="id2">Profiling Your Benchmark Points</a></li> +<li><a class="reference internal" href="#displaying-total-execution-time" id="id3">Displaying Total Execution Time</a></li> +<li><a class="reference internal" href="#displaying-memory-consumption" id="id4">Displaying Memory Consumption</a></li> +</ul> +</li> +<li><a class="reference internal" href="#class-reference" id="id5">Class Reference</a></li> +</ul> +</div> +<div class="custom-index container"></div><div class="section" id="using-the-benchmark-class"> +<h2><a class="toc-backref" href="#id1">Using the Benchmark Class</a><a class="headerlink" href="#using-the-benchmark-class" title="Permalink to this headline">¶</a></h2> +<p>The Benchmark class can be used within your +<a class="reference internal" href="../general/controllers.html"><span class="doc">controllers</span></a>, +<a class="reference internal" href="../general/views.html"><span class="doc">views</span></a>, or your <a class="reference internal" href="../general/models.html"><span class="doc">models</span></a>. +The process for usage is this:</p> +<ol class="arabic simple"> +<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> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">mark</span><span class="p">(</span><span class="s1">'code_start'</span><span class="p">);</span> + +<span class="c1">// Some code happens here</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">mark</span><span class="p">(</span><span class="s1">'code_end'</span><span class="p">);</span> + +<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">elapsed_time</span><span class="p">(</span><span class="s1">'code_start'</span><span class="p">,</span> <span class="s1">'code_end'</span><span class="p">);</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p>The words “code_start” and “code_end” are arbitrary. They +are simply words used to set two markers. You can use any words you +want, and you can set multiple sets of markers. Consider this example:</p> +<div class="last highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">mark</span><span class="p">(</span><span class="s1">'dog'</span><span class="p">);</span> + +<span class="c1">// Some code happens here</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">mark</span><span class="p">(</span><span class="s1">'cat'</span><span class="p">);</span> + +<span class="c1">// More code happens here</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">mark</span><span class="p">(</span><span class="s1">'bird'</span><span class="p">);</span> + +<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">elapsed_time</span><span class="p">(</span><span class="s1">'dog'</span><span class="p">,</span> <span class="s1">'cat'</span><span class="p">);</span> +<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">elapsed_time</span><span class="p">(</span><span class="s1">'cat'</span><span class="p">,</span> <span class="s1">'bird'</span><span class="p">);</span> +<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">elapsed_time</span><span class="p">(</span><span class="s1">'dog'</span><span class="p">,</span> <span class="s1">'bird'</span><span class="p">);</span> +</pre></div> +</div> +</div> +<div class="section" id="profiling-your-benchmark-points"> +<h3><a class="toc-backref" href="#id2">Profiling Your Benchmark Points</a><a class="headerlink" href="#profiling-your-benchmark-points" title="Permalink to this headline">¶</a></h3> +<p>If you want your benchmark data to be available to the +<a class="reference internal" href="../general/profiling.html"><span class="doc">Profiler</span></a> all of your marked points must +be set up in pairs, and each mark point name must end with _start and +_end. Each pair of points must otherwise be named identically. Example:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">mark</span><span class="p">(</span><span class="s1">'my_mark_start'</span><span class="p">);</span> + +<span class="c1">// Some code happens here...</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">mark</span><span class="p">(</span><span class="s1">'my_mark_end'</span><span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">mark</span><span class="p">(</span><span class="s1">'another_mark_start'</span><span class="p">);</span> + +<span class="c1">// Some more code happens here...</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">mark</span><span class="p">(</span><span class="s1">'another_mark_end'</span><span class="p">);</span> +</pre></div> +</div> +<p>Please read the <a class="reference internal" href="../general/profiling.html"><span class="doc">Profiler page</span></a> for more +information.</p> +</div> +<div class="section" id="displaying-total-execution-time"> +<h3><a class="toc-backref" href="#id3">Displaying Total Execution Time</a><a class="headerlink" href="#displaying-total-execution-time" title="Permalink to this headline">¶</a></h3> +<p>If you would like to display the total elapsed time from the moment +CodeIgniter starts to the moment the final output is sent to the +browser, simply place this in one of your view templates:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span> <span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">elapsed_time</span><span class="p">();</span><span class="cp">?></span> +</pre></div> +</div> +<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> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="p">{</span><span class="nx">elapsed_time</span><span class="p">}</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">If you want to benchmark anything within your controller +functions you must set your own start/end points.</p> +</div> +</div> +<div class="section" id="displaying-memory-consumption"> +<h3><a class="toc-backref" href="#id4">Displaying Memory Consumption</a><a class="headerlink" href="#displaying-memory-consumption" title="Permalink to this headline">¶</a></h3> +<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> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span> <span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">benchmark</span><span class="o">-></span><span class="na">memory_usage</span><span class="p">();</span><span class="cp">?></span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">This function can only be used in your view files. The consumption +will reflect the total memory used by the entire app.</p> +</div> +<p>An alternate way to show your memory usage in your view files is to use +this pseudo-variable, if you prefer not to use the pure PHP:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="p">{</span><span class="nx">memory_usage</span><span class="p">}</span> +</pre></div> +</div> +</div> +</div> +<div class="section" id="class-reference"> +<h2><a class="toc-backref" href="#id5">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2> +<dl class="class"> +<dt id="CI_Benchmark"> +<em class="property">class </em><code class="descname">CI_Benchmark</code><a class="headerlink" href="#CI_Benchmark" title="Permalink to this definition">¶</a></dt> +<dd><dl class="method"> +<dt id="CI_Benchmark::mark"> +<code class="descname">mark</code><span class="sig-paren">(</span><em>$name</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Benchmark::mark" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$name</strong> (<em>string</em>) – the name you wish to assign to your marker</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">void</p> +</td> +</tr> +</tbody> +</table> +<p>Sets a benchmark marker.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Benchmark::elapsed_time"> +<code class="descname">elapsed_time</code><span class="sig-paren">(</span><span class="optional">[</span><em>$point1 = ''</em><span class="optional">[</span>, <em>$point2 = ''</em><span class="optional">[</span>, <em>$decimals = 4</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Benchmark::elapsed_time" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$point1</strong> (<em>string</em>) – a particular marked point</li> +<li><strong>$point2</strong> (<em>string</em>) – a particular marked point</li> +<li><strong>$decimals</strong> (<em>int</em>) – number of decimal places for precision</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Elapsed time</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p> +</td> +</tr> +</tbody> +</table> +<p>Calculates and returns the time difference between two marked points.</p> +<p>If the first parameter is empty this function instead returns the +<code class="docutils literal"><span class="pre">{elapsed_time}</span></code> pseudo-variable. This permits the full system +execution time to be shown in a template. The output class will +swap the real value for this variable.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Benchmark::memory_usage"> +<code class="descname">memory_usage</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Benchmark::memory_usage" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Memory usage info</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">string</td> +</tr> +</tbody> +</table> +<p>Simply returns the <code class="docutils literal"><span class="pre">{memory_usage}</span></code> marker.</p> +<p>This permits it to be put it anywhere in a template without the memory +being calculated until the end. The <a class="reference internal" href="output.html"><span class="doc">Output Class</span></a> will +swap the real value for this variable.</p> +</dd></dl> + +</dd></dl> + +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="caching.html" class="btn btn-neutral float-right" title="Caching Driver">Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="index.html" class="btn btn-neutral" title="Libraries"><span class="fa fa-arrow-circle-left"></span> Previous</a> + + </div> + + + <hr/> + + <div role="contentinfo"> + <p> + © Copyright 2014 - 2018, British Columbia Institute of Technology. + Last updated on Mar 22, 2018. + </p> + </div> + + Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. + +</footer> + </div> + </div> + + </section> + + </div> + + + + + + <script type="text/javascript"> + var DOCUMENTATION_OPTIONS = { + URL_ROOT:'../', + VERSION:'3.1.8', + COLLAPSE_INDEX:false, + FILE_SUFFIX:'.html', + HAS_SOURCE: false + }; + </script> + <script type="text/javascript" src="../_static/jquery.js"></script> + <script type="text/javascript" src="../_static/underscore.js"></script> + <script type="text/javascript" src="../_static/doctools.js"></script> + + + + + + <script type="text/javascript" src="../_static/js/theme.js"></script> + + + + + <script type="text/javascript"> + jQuery(function () { + SphinxRtdTheme.StickyNav.enable(); + }); + </script> + + +</body> +</html>
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