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<title>Performance</title>
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="context.performance"></a><a class="link" href="performance.html" title="Performance">Performance</a>
</h2></div></div></div>
<p>
Performance of <span class="bold"><strong>Boost.Context</strong></span> was measured
on the platforms shown in the following table. Performance measurements were
taken using <code class="computeroutput"><span class="identifier">rdtsc</span></code> and <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">high_resolution_clock</span></code>,
with overhead corrections, on x86 platforms. In each case, cache warm-up was
accounted for, and the one running thread was pinned to a single CPU. The code
was compiled using the build options, 'variant = release cxxflags = -DBOOST_DISABLE_ASSERTS'.
</p>
<div class="table">
<a name="context.performance.performance_of_context_switch"></a><p class="title"><b>Table 1.1. Performance of context switch</b></p>
<div class="table-contents"><table class="table" summary="Performance of context switch">
<colgroup>
<col>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Platform
</p>
</th>
<th>
<p>
ucontext_t
</p>
</th>
<th>
<p>
fcontext_t
</p>
</th>
<th>
<p>
windows fibers
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
i386 <a href="#ftn.context.performance.f0" class="footnote" name="context.performance.f0"><sup class="footnote">[a]</sup></a>
</p>
</td>
<td>
<p>
708 ns / 754 cycles
</p>
</td>
<td>
<p>
37 ns / 37 cycles
</p>
</td>
<td>
<p>
ns / cycles
</p>
</td>
</tr>
<tr>
<td>
<p>
x86_64 <a href="#ftn.context.performance.f1" class="footnote" name="context.performance.f1"><sup class="footnote">[b]</sup></a>
</p>
</td>
<td>
<p>
547 ns / 1433 cycles
</p>
</td>
<td>
<p>
8 ns / 23 cycles
</p>
</td>
<td>
<p>
ns / cycles
</p>
</td>
</tr>
</tbody>
<tbody class="footnotes"><tr><td colspan="4">
<div id="ftn.context.performance.f0" class="footnote"><p><a href="#context.performance.f0" class="para"><sup class="para">[a] </sup></a>
AMD Athlon 64 DualCore 4400+
</p></div>
<div id="ftn.context.performance.f1" class="footnote"><p><a href="#context.performance.f1" class="para"><sup class="para">[b] </sup></a>
Intel Core2 Q6700
</p></div>
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<td align="right"><div class="copyright-footer">Copyright © 2009 Oliver Kowalke<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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