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- <a name="safe_numerics.performance_tests"></a>Performance Tests</h2></div></div></div>
- <p>Our goal is to create facilities which make it possible to write
- programs known to be correct. But we also want programmers to actually use
- the facilities we provide here. This won't happen if using these
- facilities impacts performance to a significant degree. Although we've
- taken precautions to avoid doing this, the only real way to know is to
- create and run some tests.</p>
- <p>So far we've only run one explicit performance test -
- <code class="filename"><a href="../../test/test_performance.cpp" target="_top">test_performance.cpp</a></code>.
- This runs a test from the Boost Multiprecision library to count prime
- numbers and uses on integer arithmetic. We've run the tests with
- <code class="computeroutput">unsigned</code> integers and with <code class="computeroutput">safe<unsigned></code>
- on two different compilers.. No other change was made to the program. We
- list the results without further comment.</p>
- <pre class="screen">g++ (GCC) 6.2.0
- Testing type unsigned:
- time = 17.6215
- count = 1857858
- Testing type safe<unsigned>:
- time = 22.4226
- count = 1857858
- clang-802.0.41
- Testing type unsigned:
- time = 16.9174
- count = 1857858
- Testing type safe<unsigned>:
- time = 36.5166
- count = 1857858
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- <td align="right"><div class="copyright-footer">Copyright © 2012-2018 Robert Ramey<p><a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">Subject to Boost
- Software License</a></p>
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