Functional vs simple code

[Timon Gehr]

On 10/03/2012 12:11 AM, Timon Gehr wrote:
> ...
>
> $ cat ixidbench.d
> module main;
> import std.stdio, std.algorithm, std.range, std.datetime;
>
> enum MAX = 10_000_000_000UL;
>
> void main() {
>      StopWatch sw;
>      sw.start;
>
>      auto sum1 = MAX.iota.map!(x => x * x).reduce!"a + b";
>
>      sw.stop;
>      sw.peek.msecs.writeln("msecs");
>      sum1.writeln;
>      sw.reset;
>      sw.start;
>
>      ulong sum2 = 0;
>      foreach(i;0..MAX)
>          sum2 += i * i;
>
>      sw.stop;
>      sw.peek.msecs.writeln("msecs");
>
>      sum2.writeln;
> }
> $ ldmd2 -O -release -inline ixidbench.d -ofixidbench
> $ ./ixidbench
> 6528msecs
> 7032546979563742720
> 7518msecs
> 7032546979563742720

$ gdmd -O -release -inline ixidbench.d -ofixidbench
$ ./ixidbench
11250msecs
7032546979563742720
11233msecs
7032546979563742720