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 Hu Chunming
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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>
<a href="cpu_timers.html">CPU timers</a>
<a href="original_timer.html">Original timers</a>
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<p>"How long does my C++ code take to run?"<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. </li>
<li>The headers live in a sub-directory, <code><boost/timer/...></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 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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