Re: A little trouble with very large arrays.

[Jacob Sparre Andersen <jacob@jacob-sparre.dk>]

Niklas Holsti wrote:

> If your FITS files are not much larger than your RAM, the fastest
> approach is probably to "mmap" the file into your virtual address
> space and then compute the address of any given image pixel with the
> flattening method. If your FITS files are larger than your RAM, your
> program should process the file as a stream, which may or may not be
> practical, depending on what the program should output.

Why not leave the transport between disk and RAM to the operating
system, and use memory mapping even if the file is larger than the RAM
of the system?

Greetings,

Jacob
-- 
"When we cite authors we cite their demonstrations, not their names"
                                                           -- Pascal