- 425 名前：デフォルトの名無しさん mailto:sage [2009/04/24(金) 16:27:09 ]
- $cat foo.cxx
#include <iostream>
#include <boost/progress.hpp>
#include <boost/shared_ptr.hpp>
class MyClass {
public:
virtual void f(){std::cerr << "MyClass f!" << std::endl;};
MyClass(){std::cerr << "MyClass Constructor!" << std::endl;};
virtual ~MyClass(){std::cerr << "MyClass Destructor!" << std::endl;}; };
void the_function(boost::shared_ptr<MyClass> p){ p->f(); }
void the_function_cr(boost::shared_ptr<MyClass> const& p){ p->f(); }
int main(){
const int M=0xffff, N=0xf;
#define FOO(f) { \
boost::progress_timer t; \
boost::shared_ptr<MyClass> po(new MyClass); \
for( unsigned long i=0; i<M; ++i ) \
for( unsigned long j=0; j<N; ++j ) \
(f)(po); \
}
FOO(the_function);
FOO(the_function_cr); }
$g++ foo.cxx
$./a.out 2>/dev/null
0.85 s
0.81 s
誤差じゃね？
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