<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Basic usage</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="hrtime.examples.html">Examples</a></div> <div class="next" style="text-align: right; float: right;"><a href="class.hrtime-performancecounter.html">HRTime\PerformanceCounter</a></div> <div class="up"><a href="hrtime.examples.html">Examples</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="hrtime.example.basic" class="section"> <h2 class="title">Basic usage</h2> <p class="para"> The example illustrates the basic StopWatch class usage </p> <div class="example" id="example-2828"> <p><strong>Example #1 Measure several code blocks execution and get the total</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br /><br />$c </span><span style="color: #007700">= new </span><span style="color: #0000BB">HRTime</span><span style="color: #007700">\</span><span style="color: #0000BB">StopWatch</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">start</span><span style="color: #007700">();<br /></span><span style="color: #FF8000">/* measure this code block execution */<br /></span><span style="color: #007700">for (</span><span style="color: #0000BB">$i </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">; </span><span style="color: #0000BB">$i </span><span style="color: #007700">< </span><span style="color: #0000BB">1024</span><span style="color: #007700">*</span><span style="color: #0000BB">1024</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700">++);<br /></span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">stop</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$elapsed0 </span><span style="color: #007700">= </span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">getLastElapsedTime</span><span style="color: #007700">(</span><span style="color: #0000BB">HRTime</span><span style="color: #007700">\</span><span style="color: #0000BB">Unit</span><span style="color: #007700">::</span><span style="color: #0000BB">NANOSECOND</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* measurement is not running here*/<br /></span><span style="color: #007700">for (</span><span style="color: #0000BB">$i </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">; </span><span style="color: #0000BB">$i </span><span style="color: #007700">< </span><span style="color: #0000BB">1024</span><span style="color: #007700">*</span><span style="color: #0000BB">1024</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700">++);<br /><br /></span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">start</span><span style="color: #007700">();<br /></span><span style="color: #FF8000">/* measure this code block execution */<br /></span><span style="color: #007700">for (</span><span style="color: #0000BB">$i </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">; </span><span style="color: #0000BB">$i </span><span style="color: #007700">< </span><span style="color: #0000BB">1024</span><span style="color: #007700">*</span><span style="color: #0000BB">1024</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700">++);<br /></span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">stop</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$elapsed1 </span><span style="color: #007700">= </span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">getLastElapsedTime</span><span style="color: #007700">(</span><span style="color: #0000BB">HRTime</span><span style="color: #007700">\</span><span style="color: #0000BB">Unit</span><span style="color: #007700">::</span><span style="color: #0000BB">NANOSECOND</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$elapsed_total </span><span style="color: #007700">= </span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">getElapsedTime</span><span style="color: #007700">(</span><span style="color: #0000BB">HRTime</span><span style="color: #007700">\</span><span style="color: #0000BB">Unit</span><span style="color: #007700">::</span><span style="color: #0000BB">NANOSECOND</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; 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