my first D program (and benchmark against perl)

[perlancar via Digitalmars-d-learn]

On Wednesday, 11 November 2015 at 14:26:32 UTC, Andrea Fontana 
wrote:
> Did you try rdmd -O -noboundscheck -release yourscript.d ?

I just did. It improves speed from 17.127s to 14.831s. Nice, but 
nowhere near gdc/ldc level.

> You should try using appender!string rather than concatenate 
> (http://dlang.org/phobos/std_array.html#.Appender) using 
> capacity 
> (http://dlang.org/phobos/std_array.html#.Appender.capacity) to 
> improve performace.

> You should also switch from for to foreach.

Thanks for the above 2 tips.