ence between two marked points.</p>
<p>If the first parameter is empty this function instead returns the
<tt class="docutils literal"><span class="pre">{elapsed_time}</span></tt> 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">
<tt class="descname">memory_usage</tt><big>(</big><big>)</big><a class="headerlink" href="#CI_Benchmark::memory