Optimization ???

[Mattdef]

Hi

Why this code is 2 times longer in D then C# ?


module hello;

import std.stdio;
import std.datetime;
import std.string;
import std.conv;

int main(string[] argv)
{
    writeln("Tape \"Y\" to launch benchmark or any other touch to 
exit program :");
        string s = chomp(readln());

        while(s == "y" || s == "Y")
        {
                auto bench = benchmark!(Benchmark)(1);
                writefln("Execution time : %s ms", bench[0].msecs);

                s = chomp(readln());
        }

    return 0;
}

void Benchmark()
{
        uint count = 0;
        student michael = null;

        while (count < 1_000_000)
        {
                michael = new student("Michael", Date(1998, 5, 1), 12);
                michael.setName("Joseph" ~ to!string(count));
                count++;
        }
        writeln(michael.getState());
}

class student
{
        private:
        string _name;
        Date _birthday;
        int _evaluation;

        public:
        string getState()
        {
		return _name ~ "'s birthday " ~ _birthday.toSimpleString() ~ " 
and his evaluation is " ~ to!string(_evaluation);
        }

        this(string name, Date birthday, int eval)
        {
                _name = name;
                _birthday = birthday;
                _evaluation = eval;
        }

        void setName(string name)
        {
                _name = name;
        }

        void setBirthday(Date birthday)
        {
                _birthday = birthday;
        }

        void setEvaluation(int eval)
        {
                _evaluation = eval;
        }
}