"Charles Fusner" <cfu### [at] enternet> wrote in message
news:3D7### [at] enternet...
> Pandora wrote:
>  >     Why the need to keep it memory - are their really any modern
computer
>  > systems that don't allow complete random read-write access to files ?
>  >     Think about Windows virtual memory files and you'll see there's
> no need
>  > to actually keep the whole image in physical memory...
>
> True, but then wouldn't you take a performance hit all over again?


    Yes, you're going to take a slight performance hit, but on a modern
machine, with a decent harddisk and some intelligently written buffering
code (i.e. you keep the areas of the image that are most likely to be
accessed in memory, rather than accessing a file on disk for each and every
pixel) that hit will be negligible.

--
Pandora/Scott Hill/[::O:M:C::]Scorpion
Software Engineer.
http://www.pandora-software.com

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