238 lines
13 KiB
HTML
238 lines
13 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
<html>
|
||
<head>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
||
<title>Performance</title>
|
||
<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css">
|
||
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
|
||
<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
|
||
<link rel="up" href="../metaparse.html" title="Chapter 24. Boost.Metaparse">
|
||
<link rel="prev" href="versioning.html" title="Versioning">
|
||
<link rel="next" href="the_design_of_the_library.html" title="The design of the library">
|
||
</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="versioning.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../metaparse.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="the_design_of_the_library.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="metaparse.performance"></a><a class="link" href="performance.html" title="Performance">Performance</a>
|
||
</h2></div></div></div>
|
||
<div class="toc"><dl class="toc">
|
||
<dt><span class="section"><a href="performance.html#metaparse.performance.benchmarks_of_boost_metaparse_st">Benchmarks
|
||
of BOOST_METAPARSE_STRING</a></span></dt>
|
||
<dt><span class="section"><a href="performance.html#metaparse.performance.measuring_printf">Measuring printf</a></span></dt>
|
||
<dt><span class="section"><a href="performance.html#metaparse.performance.further_measurements">Further measurements</a></span></dt>
|
||
</dl></div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="metaparse.performance.benchmarks_of_boost_metaparse_st"></a><a name="BOOST_METAPARSE_STRING_benchmark"></a><a class="link" href="performance.html#metaparse.performance.benchmarks_of_boost_metaparse_st" title="Benchmarks of BOOST_METAPARSE_STRING">Benchmarks
|
||
of BOOST_METAPARSE_STRING</a>
|
||
</h3></div></div></div>
|
||
<div class="toc"><dl class="toc">
|
||
<dt><span class="section"><a href="performance.html#metaparse.performance.benchmarks_of_boost_metaparse_st.increasing_string_length">Increasing
|
||
string length</a></span></dt>
|
||
<dt><span class="section"><a href="performance.html#metaparse.performance.benchmarks_of_boost_metaparse_st.increasing_number_of_strings">Increasing
|
||
number of strings</a></span></dt>
|
||
<dt><span class="section"><a href="performance.html#metaparse.performance.benchmarks_of_boost_metaparse_st.increasing_string_length_limit">Increasing
|
||
string length limit</a></span></dt>
|
||
</dl></div>
|
||
<p>
|
||
Measurements related to the performance of the <a class="link" href="reference.html#BOOST_METAPARSE_STRING"><code class="computeroutput"><span class="identifier">BOOST_METAPARSE_STRING</span></code></a> macro.
|
||
</p>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h4 class="title">
|
||
<a name="metaparse.performance.benchmarks_of_boost_metaparse_st.increasing_string_length"></a><a class="link" href="performance.html#metaparse.performance.benchmarks_of_boost_metaparse_st.increasing_string_length" title="Increasing string length">Increasing
|
||
string length</a>
|
||
</h4></div></div></div>
|
||
<p>
|
||
128 strings with increasing length. Measured on a Linux-3.13.0-24-generic-x86_64-with-Ubuntu-14.04-trusty
|
||
host with 16 GB memory. Compiler used: gcc 4.8.5.
|
||
</p>
|
||
<p>
|
||
<span class="inlinemediaobject"><img src="../images/metaparse/length128_gcc_4.8.5.png" width="100%"></span>
|
||
</p>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h4 class="title">
|
||
<a name="metaparse.performance.benchmarks_of_boost_metaparse_st.increasing_number_of_strings"></a><a class="link" href="performance.html#metaparse.performance.benchmarks_of_boost_metaparse_st.increasing_number_of_strings" title="Increasing number of strings">Increasing
|
||
number of strings</a>
|
||
</h4></div></div></div>
|
||
<p>
|
||
Increasing number of strings with 64 length. Measured on a Linux-3.13.0-24-generic-x86_64-with-Ubuntu-14.04-trusty
|
||
host with 16 GB memory. Compiler used: gcc 4.8.5.
|
||
</p>
|
||
<p>
|
||
<span class="inlinemediaobject"><img src="../images/metaparse/number_gcc_4.8.5.png" width="100%"></span>
|
||
</p>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h4 class="title">
|
||
<a name="metaparse.performance.benchmarks_of_boost_metaparse_st.increasing_string_length_limit"></a><a class="link" href="performance.html#metaparse.performance.benchmarks_of_boost_metaparse_st.increasing_string_length_limit" title="Increasing string length limit">Increasing
|
||
string length limit</a>
|
||
</h4></div></div></div>
|
||
<p>
|
||
100 one character long strings with increasing maximum length. Measured
|
||
on a Linux-3.13.0-24-generic-x86_64-with-Ubuntu-14.04-trusty host with
|
||
16 GB memory. Compiler used: gcc 4.8.5.
|
||
</p>
|
||
<p>
|
||
<span class="inlinemediaobject"><img src="../images/metaparse/max_length_gcc_4.8.5.png" width="100%"></span>
|
||
</p>
|
||
</div>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="metaparse.performance.measuring_printf"></a><a class="link" href="performance.html#metaparse.performance.measuring_printf" title="Measuring printf">Measuring printf</a>
|
||
</h3></div></div></div>
|
||
<p>
|
||
Parsers work at compile-time, thus their performance affects compilation
|
||
speed. This section shows measurements of compilation time using Metaparse.
|
||
The measurements were done on a Linux laptop with an 1.6 GHz Atom processor
|
||
and 1 GB memory. The measurements were done using GCC 4.6.1 with <code class="computeroutput"><span class="special">-</span><span class="identifier">std</span><span class="special">=</span><span class="identifier">c</span><span class="special">++</span><span class="number">0</span><span class="identifier">x</span></code> and no optimisation. Compilation speed
|
||
was measured using the <code class="computeroutput"><span class="identifier">time</span></code>
|
||
utility.
|
||
</p>
|
||
<p>
|
||
To measure a non-trivial parser, the <code class="computeroutput"><span class="identifier">printf</span></code>
|
||
example program were used for measurements. Here is a list of the <code class="computeroutput"><span class="identifier">printf</span></code> calls and their compilation speed
|
||
(<code class="computeroutput"><span class="identifier">user</span></code> output of <code class="computeroutput"><span class="identifier">time</span></code>):
|
||
</p>
|
||
<div class="table">
|
||
<a name="metaparse.performance.measuring_printf.printf_compilation_speed"></a><p class="title"><b>Table 24.1. Printf compilation speed</b></p>
|
||
<div class="table-contents"><table class="table" summary="Printf compilation speed">
|
||
<colgroup>
|
||
<col>
|
||
<col>
|
||
</colgroup>
|
||
<thead><tr>
|
||
<th>
|
||
<p>
|
||
type-safe <code class="computeroutput"><span class="identifier">printf</span></code>
|
||
call
|
||
</p>
|
||
</th>
|
||
<th>
|
||
<p>
|
||
Compilation speed (s)
|
||
</p>
|
||
</th>
|
||
</tr></thead>
|
||
<tbody>
|
||
<tr>
|
||
<td>
|
||
<p>
|
||
No compile-time parsing (just the includes and an empty <code class="computeroutput"><span class="identifier">main</span></code>)
|
||
</p>
|
||
</td>
|
||
<td>
|
||
<p>
|
||
3.51
|
||
</p>
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<p>
|
||
<code class="computeroutput"><span class="identifier">printf</span><span class="special"><</span><span class="identifier">BOOST_METAPARSE_STRING</span><span class="special">(</span><span class="string">"%f"</span><span class="special">)>(</span><span class="number">1.0</span><span class="special">)</span></code>
|
||
</p>
|
||
</td>
|
||
<td>
|
||
<p>
|
||
4.95
|
||
</p>
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<p>
|
||
<code class="computeroutput"><span class="identifier">printf</span><span class="special"><</span><span class="identifier">BOOST_METAPARSE_STRING</span><span class="special">(</span><span class="string">"%f%f"</span><span class="special">)>(</span><span class="number">1.0</span><span class="special">,</span> <span class="number">2.0</span><span class="special">)</span></code>
|
||
</p>
|
||
</td>
|
||
<td>
|
||
<p>
|
||
5.26
|
||
</p>
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<p>
|
||
<code class="computeroutput"><span class="identifier">printf</span><span class="special"><</span><span class="identifier">BOOST_METAPARSE_STRING</span><span class="special">(</span><span class="string">"%f%f%f"</span><span class="special">)>(</span><span class="number">1.0</span><span class="special">,</span> <span class="number">2.0</span><span class="special">,</span> <span class="number">3.0</span><span class="special">)</span></code>
|
||
</p>
|
||
</td>
|
||
<td>
|
||
<p>
|
||
5.50
|
||
</p>
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<p>
|
||
<code class="computeroutput"><span class="identifier">printf</span><span class="special"><</span><span class="identifier">BOOST_METAPARSE_STRING</span><span class="special">(</span><span class="string">"%f%f%f%f"</span><span class="special">)>(</span><span class="number">1.0</span><span class="special">,</span> <span class="number">2.0</span><span class="special">,</span> <span class="number">3.0</span><span class="special">,</span> <span class="number">4.0</span><span class="special">)</span></code>
|
||
</p>
|
||
</td>
|
||
<td>
|
||
<p>
|
||
5.82
|
||
</p>
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<p>
|
||
<code class="computeroutput"><span class="identifier">printf</span><span class="special"><</span><span class="identifier">BOOST_METAPARSE_STRING</span><span class="special">(</span><span class="string">"%f%f%f%f%f"</span><span class="special">)>(</span><span class="number">1.0</span><span class="special">,</span> <span class="number">2.0</span><span class="special">,</span> <span class="number">3.0</span><span class="special">,</span> <span class="number">4.0</span><span class="special">,</span> <span class="number">5.0</span><span class="special">)</span></code>
|
||
</p>
|
||
</td>
|
||
<td>
|
||
<p>
|
||
6.07
|
||
</p>
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<br class="table-break">
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="metaparse.performance.further_measurements"></a><a class="link" href="performance.html#metaparse.performance.further_measurements" title="Further measurements">Further measurements</a>
|
||
</h3></div></div></div>
|
||
<p>
|
||
Further measurements can be found in the following paper:
|
||
</p>
|
||
<p>
|
||
Zoltán Porkoláb, Ábel Sinkovics: <br> <span class="bold"><strong>Domain-specific
|
||
Language Integration with Compile-time Parser Generator Library</strong></span>
|
||
<br> In Eelco Visser, Jaakko Järvi, editors, Proceedings of the ninth
|
||
international conference on Generative programming and component engineering
|
||
(GPCE 2010). ACM, October 2010, pp. 137-146.
|
||
</p>
|
||
</div>
|
||
</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 © 2015 Abel Sinkovics<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="versioning.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../metaparse.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="the_design_of_the_library.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
|
||
</div>
|
||
</body>
|
||
</html>
|