| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>Performance</title> |
| <link rel="stylesheet" href="../math.css" type="text/css"> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.77.1"> |
| <link rel="home" href="../index.html" title="Math Toolkit 2.2.0"> |
| <link rel="up" href="../overview.html" title="Chapter 1. Overview"> |
| <link rel="prev" href="threads.html" title="Thread Safety"> |
| <link rel="next" href="building.html" title="If and How to Build a Boost.Math Library, and its Examples and Tests"> |
| </head> |
| <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> |
| <table cellpadding="2" width="100%"><tr> |
| <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../boost.png"></td> |
| <td align="center"><a href="../../../../../index.html">Home</a></td> |
| <td align="center"><a href="../../../../../libs/libraries.htm">Libraries</a></td> |
| <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> |
| <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> |
| <td align="center"><a href="../../../../../more/index.htm">More</a></td> |
| </tr></table> |
| <hr> |
| <div class="spirit-nav"> |
| <a accesskey="p" href="threads.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="building.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h2 class="title" style="clear: both"> |
| <a name="math_toolkit.perf_over1"></a><a class="link" href="perf_over1.html" title="Performance">Performance</a> |
| </h2></div></div></div> |
| <p> |
| By and large the performance of this library should be acceptable for most |
| needs. However, you should note that this library's primary emphasis is on |
| accuracy and numerical stability, and <span class="emphasis"><em>not</em></span> speed. |
| </p> |
| <p> |
| In terms of the algorithms used, this library aims to use the same "best |
| of breed" algorithms as many other libraries: the principle difference |
| is that this library is implemented in C++ - taking advantage of all the abstraction |
| mechanisms that C++ offers - where as most traditional numeric libraries are |
| implemented in C or FORTRAN. Traditionally languages such as C or FORTRAN are |
| perceived as easier to optimise than more complex languages like C++, so in |
| a sense this library provides a good test of current compiler technology, and |
| the "abstraction penalty" - if any - of C++ compared to other languages. |
| </p> |
| <p> |
| The two most important things you can do to ensure the best performance from |
| this library are: |
| </p> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| Turn on your compilers optimisations: the difference between "release" |
| and "debug" builds can easily be a <a class="link" href="getting_best.html" title="Getting the Best Performance from this Library">factor |
| of 20</a>. |
| </li> |
| <li class="listitem"> |
| Pick your compiler carefully: <a class="link" href="comp_compilers.html" title="Comparing Compilers">performance |
| differences of up to 8 fold</a> have been found between some Windows |
| compilers for example. |
| </li> |
| </ol></div> |
| <p> |
| The <a class="link" href="../perf.html" title="Chapter 15. Performance">performance section</a> contains more information |
| on the performance of this library, what you can do to fine tune it, and how |
| this library compares to some other open source alternatives. |
| </p> |
| </div> |
| <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> |
| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2006-2010, 2012-2014 Nikhar Agrawal, |
| Anton Bikineev, Paul A. Bristow, Marco Guazzone, Christopher Kormanyos, Hubert |
| Holin, Bruno Lalande, John Maddock, Johan Råde, Gautam Sewani, Benjamin Sobotta, |
| Thijs van den Berg, Daryle Walker and Xiaogang Zhang<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>) |
| </p> |
| </div></td> |
| </tr></table> |
| <hr> |
| <div class="spirit-nav"> |
| <a accesskey="p" href="threads.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="building.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| </body> |
| </html> |
