AW: is the platform on 64bit windows systems also win32?

[Björnke von Gierke]

On 27 Jan 2010, at 14:25, Richmond Mathewson wrote:

> Do you know how much RAM a Mac OS X program can address?

That depends on several things.

If it's a 64-bit binary (aka. not runrev) then it's quite a lot (more then 99% of the people have installed, including hard disk caching).

If it's a 32 cocoa app, there's a limit of shortly below 4 gb. However, os x 32 bit libraries have tricks to expand that, and if rev uses one of those, then it's more like never ending.

I have yet to encounter any user-run program that _needs_ more then 4 gb of ram. 3D games are famous for using gigantic amounts of ram and hard disk space (mostly for the textures). Many of those need at least 2 gb of ram, but work better with 4 gb (they also need at least 10 gb hd space). Other ram-heavy applications are image-, sound- or video-editing, and special kinds of databases. Some servers also use large amount of ram, most of them real time stuff (ie. milliseconds trading) or web crawlers. 

If you are not developing one of those examples, the general rule for ram demand these days is:

You do not need to care.

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