<?xml version="1.0" encoding="utf-8"?>
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<chapter xml:id="hrtime.examples" xmlns="http://docbook.org/ns/docbook">
 &reftitle.examples;
 <section xml:id="hrtime.example.basic">
  <title>Basic usage</title>
  <para>
   The example illustrates the basic StopWatch class usage
  </para>
  <example>
   <title>Measure several code blocks execution and get the total</title>
   <programlisting role="php">
<![CDATA[
<?php

$c = new HRTime\StopWatch;

$c->start();
/* measure this code block execution */
for ($i = 0; $i < 1024*1024; $i++);
$c->stop();
$elapsed0 = $c->getLastElapsedTime(HRTime\Unit::NANOSECOND);

/* measurement is not running here*/
for ($i = 0; $i < 1024*1024; $i++);

$c->start();
/* measure this code block execution */
for ($i = 0; $i < 1024*1024; $i++);
$c->stop();
$elapsed1 = $c->getLastElapsedTime(HRTime\Unit::NANOSECOND);

$elapsed_total = $c->getElapsedTime(HRTime\Unit::NANOSECOND);

?>
]]>
   </programlisting>
  </example>
 </section>
</chapter>

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