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    <font size="7">Timer Library<br>
    Version 2</font>
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    <td><a href="index.html">Timer Home</a> &nbsp;&nbsp;
    <a href="cpu_timers.html">CPU timers</a> &nbsp;&nbsp;
    <a href="original_timer.html">Original timers</a> &nbsp;&nbsp;
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<p>&quot;How long does my C++ code take to run?&quot;<p>The Boost Timer library 
answers that question and does so portably, with as little as one #include and one 
additional line of code.<p>The Boost Timer library has two distinct sets of 
components:<ul>
  <li>If you are new to the library, please go directly to the version 2
    <a href="cpu_timers.html">CPU timers</a> page.</li>
  <li>If you are interested in 
the original library, now deprecated, read on below.</li>
  </ul>
  <h2>
    <a href="cpu_timers.html">CPU timers</a></h2>
<p>These version 2 components conform to current Boost practice:</p>
<ul>
  <li>The interfaces and their semantics are the same across all platforms.</li>
  <li>The internal implementation uses operating system specific APIs to achieve 
  higher precision and supply functionality not otherwise available.&nbsp; </li>
  <li>The headers live in a sub-directory, <code>&lt;boost/timer/...&gt;</code>.</li>
  <li>The content is in a sub-namespace, <code>boost::timer</code>.</li>
</ul>
<h2 dir="ltr">
    <a href="original_timer.html">Original timers</a></h2>
<p>These version 1 components are deprecated. They date from the earliest days 
of Boost and do not conform to current Boost practice:</p>
<ul>
  <li>The interfaces are the same across all platforms, but the semantics differ 
  according to platform. Wall-clock time is measured on Windows, while CPU time 
  is measured on POSIX-like systems.</li>
  <li>The internal implementation uses only C/C++ standard library functions, so 
  cannot supply desirable precision and functionality.</li>
  <li>The headers live in the main Boost header directory.</li>
  <li>The content are in namespace <code>boost</code>.</li>
</ul>
<hr>
<p><font size="2">Revised:
<!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B %Y" startspan -->07 October 2011<!--webbot bot="Timestamp" endspan i-checksum="32191" --></font></p>

<p><font size="2">© Copyright Beman Dawes&nbsp; 2001, 2011</font></p>

<p><font size="2">Distributed under the Boost Software License, Version 1.0. See
</font>
<a href="http://www.boost.org/LICENSE_1_0.txt"><font size="2">www.boost.org/LICENSE_1_0.txt</font></a></p>


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