| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>Code bloat</title> |
| <link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css"> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> |
| <link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> |
| <link rel="up" href="../boost_typeindex.html" title="Chapter 34. Boost.TypeIndex 4.0"> |
| <link rel="prev" href="space_and_performance.html" title="Space and Performance"> |
| <link rel="next" href="rtti_emulation_limitations.html" title="RTTI emulation limitations"> |
| </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="space_and_performance.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../boost_typeindex.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="rtti_emulation_limitations.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="boost_typeindex.code_bloat"></a><a class="link" href="code_bloat.html" title="Code bloat">Code bloat</a> |
| </h2></div></div></div> |
| <p> |
| Without RTTI TypeIndex library will switch from using <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">typeindex</span><span class="special">::</span><span class="identifier">stl_type_index</span></code> |
| class to <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">typeindex</span><span class="special">::</span><span class="identifier">ctti_type_index</span></code>. <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">typeindex</span><span class="special">::</span><span class="identifier">ctti_type_index</span></code> |
| uses macro for getting full text representation of function name for each type |
| that is passed to <code class="computeroutput"><span class="identifier">type_id</span><span class="special">()</span></code> |
| and <code class="computeroutput"><span class="identifier">type_id_with_cvr</span><span class="special">()</span></code> |
| functions. |
| </p> |
| <p> |
| This leads to big strings in binary file: |
| </p> |
| <pre class="programlisting"><span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">detail</span><span class="special">::</span><span class="identifier">ctti</span><span class="special"><</span><span class="identifier">T</span><span class="special">>::</span><span class="identifier">n</span><span class="special">()</span> <span class="special">[</span><span class="identifier">with</span> <span class="identifier">T</span> <span class="special">=</span> <span class="keyword">int</span><span class="special">]</span> |
| <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">detail</span><span class="special">::</span><span class="identifier">ctti</span><span class="special"><</span><span class="identifier">T</span><span class="special">>::</span><span class="identifier">n</span><span class="special">()</span> <span class="special">[</span><span class="identifier">with</span> <span class="identifier">T</span> <span class="special">=</span> <span class="identifier">user_defined_type</span><span class="special">]</span> |
| </pre> |
| <p> |
| While using RTTI, you'll get the following (more compact) string in binary |
| file: |
| </p> |
| <pre class="programlisting"><span class="identifier">i</span> |
| <span class="number">17u</span><span class="identifier">ser_defined_type</span> |
| </pre> |
| </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 © 2012-2014 Antony Polukhin<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="space_and_performance.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../boost_typeindex.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="rtti_emulation_limitations.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| </body> |
| </html> |
