Is continuously seeding a random number generator performance intensive?

[marcpmichel]

On Thursday, 2 January 2014 at 20:38:10 UTC, Jeroen Bollen wrote:
>
> Is it good to re-seed a generator for every coordinate, will 
> this be performance intensive? Is there maybe way to easily 
> implement Generator.at(uint x) in D?

http://www.valion-game.com/337/noise-functions-to-generate-landscapes/

I successfully implemented a D version of the above for my toy 
voxel engine project.
I will be happy to share it ( it's currently not uploaded 
anywhere ).