Re: Xcode 3.0 in 32- or 64-bit mode?
Re: Xcode 3.0 in 32- or 64-bit mode?
- Subject: Re: Xcode 3.0 in 32- or 64-bit mode?
- From: Wade Tregaskis <email@hidden>
- Date: Sat, 27 Oct 2007 22:10:43 -0700
Can someone explain why one would choose to run Xcode in 32- or 64-
bit mode? Is there some reason why it doesn't just pick the right
one for the hardware? Some caveats with generating or debugging 32-
bit code when Xcode is in 64-bit mode?
The first time you launch a 64-bit app, it loads up all the 64-bit
versions of the various libraries it uses. For Cocoa apps, that's
generally a lot of libraries. This increases the system's memory
burden by a non-trivial amount. So, given that most [GUI] apps are
today 32-bit only, it's generally preferable to run Xcode in 32-bit
to avoid this hit.
In my own opinion this is a good reason why developers should provide
64-bit versions of their apps, even if they don't need it
otherwise... presumably someday there'll be movement to 64-bit by
default, rather than 32, and you don't want to be that one 32-bit-
only app keeping all those shared libraries tied up...
Wade
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