Tim N. van der Leeuw wrote:
> Incidentally, I also have a version compiled with VC++ 6 now... (not
> yet w/VC++ 7) .. Compiled with release-flags and maximum optimization
> for speed, here's the result of VC++ 6:
<snip>
OK, now I'm getting obsessed with this too ;-)
I'm using VC++ Express, I didn't care to tweak the optimizations, I
merely chose the "Release" configuration for the executable. It's
blazing fast, taking only 30+ ms each run.
Here's the code:
int main(){
DWORD begin = ::GetTickCount();
vector<string> a;
string c = "What do you know?";
string d = "so long...";
string e = "chicken crosses road";
string f = "fool";
for (long int i=0; i<10000 ; ++i){
a.push_back(c);
a.push_back(d);
a.push_back(e);
a.push_back(f);
}
set<string> b(a.begin(), a.end());
unique_copy(b.begin(), b.end(), ostream_iterator<string>(cout,
"\n"));
DWORD end = ::GetTickCount();
cout << "Ends in " << (end - begin) << " ms.";
}
And here's the result:
\TestSTL\release>TestSTL.exe
What do you know?
chicken crosses road
fool
so long...
Ends in 31 ms.
I tried the original version:
int main(){
DWORD begin = ::GetTickCount();
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"));
DWORD end = ::GetTickCount();
cout << "Ends in " << (end - begin) << " ms.";
}
And the result is only 50% slower:
\TestSTL\release>TestSTL.exe
What do you know?
chicken crosses road
fool
so long...
Ends in 47 ms.
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