[Boost-commit] svn:boost r55026 - trunk/libs/spirit/benchmarks/qi

Subject: [Boost-commit] svn:boost r55026 - trunk/libs/spirit/benchmarks/qi
From: joel_at_[hidden]
Date: 2009-07-19 06:19:56

Author: djowel
Date: 2009-07-19 06:19:55 EDT (Sun, 19 Jul 2009)
New Revision: 55026
URL: http://svn.boost.org/trac/boost/changeset/55026

Log:
added int_ benchmarks
Added:
   trunk/libs/spirit/benchmarks/qi/
   trunk/libs/spirit/benchmarks/qi/uint_parser.cpp   (contents, props changed)

Added: trunk/libs/spirit/benchmarks/qi/uint_parser.cpp
==============================================================================
--- (empty file)
+++ trunk/libs/spirit/benchmarks/qi/uint_parser.cpp	2009-07-19 06:19:55 EDT (Sun, 19 Jul 2009)
@@ -0,0 +1,115 @@
+/*=============================================================================
+    Copyright (c) 2001-2009 Joel de Guzman
+
+    Distributed under the Boost Software License, Version 1.0. (See accompanying
+    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+=============================================================================*/
+#if defined(BOOST_MSVC)
+#pragma inline_depth(255)
+#pragma inline_recursion(on)
+#define _SECURE_SCL 0 
+#endif // defined(BOOST_MSVC)
+
+#include "../high_resolution_timer.hpp"
+#include <boost/spirit/include/qi.hpp>
+#include <boost/lexical_cast.hpp>
+#include <climits>
+#include <cstdlib>
+#include <string>
+#include <vector>
+
+#define MAX_ITERATION 10000000
+
+void check(int a, int b)
+{
+    if (a != b)
+    {
+        std::cout << "Parse Error" << std::endl;
+        abort();
+    }
+}
+
+int main()
+{
+    namespace qi = boost::spirit::qi;
+    using qi::int_;
+    
+    std::cout << "initializing input strings..." << std::endl;
+    std::vector<int> src(MAX_ITERATION);
+    std::vector<std::string> src_str(MAX_ITERATION);
+    for (int i = 0; i < MAX_ITERATION; ++i)
+    {
+        src[i] = std::rand() * std::rand();
+        src_str[i] = boost::lexical_cast<std::string>(src[i]);
+    }
+    
+    std::vector<int> v(MAX_ITERATION);
+
+    // test the C libraries atoi function (the most low level function for
+    // string conversion available)
+    {
+        util::high_resolution_timer t;
+
+        for (int i = 0; i < MAX_ITERATION; ++i)
+        {
+            v[i] = atoi(src_str[i].c_str());
+        }
+
+        std::cout << "atoi: " << t.elapsed() << " [s]" << std::flush << std::endl;
+        
+        for (int i = 0; i < MAX_ITERATION; ++i)
+        {
+            check(v[i], src[i]);
+        }
+    }
+    
+    // test the C libraries strtol function (the most low level function for
+    // string conversion available)
+    {
+        util::high_resolution_timer t;
+
+        for (int i = 0; i < MAX_ITERATION; ++i)
+        {
+            v[i] = strtol(src_str[i].c_str(), 0, 10);
+        }
+
+        std::cout << "strtol: " << t.elapsed() << " [s]" << std::flush << std::endl;
+        
+        for (int i = 0; i < MAX_ITERATION; ++i)
+        {
+            check(v[i], src[i]);
+        }
+    }
+    
+    // test the Qi int_ parser routines 
+    {
+        std::vector<char const*> f(MAX_ITERATION);
+        std::vector<char const*> l(MAX_ITERATION);
+
+        // get the first/last iterators
+        for (int i = 0; i < MAX_ITERATION; ++i)
+        {
+            f[i] = src_str[i].c_str();
+            l[i] = f[i];
+            while (*l[i])
+                l[i]++;
+        }
+    
+        util::high_resolution_timer t;
+
+        for (int i = 0; i < MAX_ITERATION; ++i)
+        {
+            qi::parse(f[i], l[i], int_, v[i]);
+        }
+
+        std::cout << "int_: " << t.elapsed() << " [s]" << std::flush << std::endl;
+        
+        for (int i = 0; i < MAX_ITERATION; ++i)
+        {
+            check(v[i], src[i]);
+        }
+    }
+
+    return 0;
+}
+