Python and STL efficiency

[Ray]

How did you compile the C++ executable? I assume that it is Release
mode? Then are the optimization switches enabled? Is it compiled as
Native Win32 or Managed application?

I suspect that other than what other posters have suggested about your
code, the difference in speed is due to the way you build your C++
executable...

HTH,
Ray

Licheng Fang wrote:
> Hi, I'm learning STL and I wrote some simple code to compare the
> efficiency of python and STL.
>
> //C++
> #include <iostream>
> #include <string>
> #include <vector>
> #include <set>
> #include <algorithm>
> using namespace std;
>
> int main(){
> 	vector<string> a;
> 	for (long int i=0; i<10000 ; ++i){
> 		a.push_back("What do you know?");
> 		a.push_back("so long...");
> 		a.push_back("chicken crosses road");
> 		a.push_back("fool");
> 	}
> 	set<string> b(a.begin(), a.end());
> 	unique_copy(b.begin(), b.end(), ostream_iterator<string>(cout, "\n"));
> }
>
> #python
> def f():
> 	a = []
> 	for i in range(10000):
> 		a.append('What do you know')
> 		a.append('so long...')
> 		a.append('chicken crosses road')
> 		a.append('fool')
> 	b = set(a)
> 	for s in b:
> 		print s
>
> I was using VC++.net and IDLE, respectively. I had expected C++ to be
> way faster. However, while the python code gave the result almost
> instantly, the C++ code took several seconds to run! Can somebody
> explain this to me? Or is there something wrong with my code?