On Thursday 10 February 2005 19:20, Christian Szegedy wrote:
> ... This example was extracted from a program which
> massively shuffles around the content of this 3-dimensional grid.
> (Both work fine and yield identical output.)

Perhaps a non-uniform data structure would be more suitable? OCaml would 
really shine at this...

> To my astonishment, the OCaml was a bit faster than C when
> working on the grid, but the speed of allocation was nowhere
> near to that of the C version.

Yes, there is a lot of overhead when doing this in ocaml.

> This was a surprise to me, since I thought that OCaml is quite
> competitive in this regard.

No, I've also found this with a wavelet transform too. The time taken to do 
the transform was within a few percent but the time taken to initialise was 
double for ocaml compared to C, IIRC.

-- 
Dr Jon D Harrop, Flying Frog Consultancy Ltd.