[comp.sys.mac.programmer] Multifinder memory costs

jchiu@ccvaxa.UUCP (03/15/88)

/* Written  1:36 pm  Mar 11, 1988 by lsr@Apple.COM in ccvaxa:comp.sys.mac */

>> ...  Sure it would have been easier and
>> smaller to design in MultiTasking from the start, but MultiFinder is not
>> large (50K) and it works very well... 

Off the heated topic of window interface, does anyone care to explain
the memory requirement for starting multifinder?

Typically, after starting up with plain finder, the About Box says: 
	220K for the system,
        8xxk(the rest) for the finder

Then, if I start up multifinder by double click its icon with opt and command
keys, the About Box will say:
	350K for the system
	160K for the finder

It does seem to take more than 50K for the system heap when using multifinder,
isn't it?   Is this memory usage typical (normal) on a 1-Meg SE?

Jeff Chiu
Gould CSD-Urbana
jchiu@gswd_vms
ihnp4!uiucuxc!ccvaxa!jchiu
 

lsr@Apple.COM (Larry Rosenstein) (03/17/88)

In article <62100001@ccvaxa> jchiu@ccvaxa.UUCP writes:
>
>	350K for the system
>	160K for the finder

The difference is probably system resource that you don't notice under
UniFinder because they are in the application heap.

Under MultiFinder, resources that come out of the System file are loaded
into the system heap, rather than the application heap.  A good example are
fonts.  Under regular Finders, any fonts used by the Finder would be in the
8xxK of memory assigned to it.  Under MultiFinder, this memory would fall
into the System category.

The advantage of this is that if you run another application that uses the
same fonts, the resources will be loaded only once.

-- 
		 Larry Rosenstein,  Object Specialist
 Apple Computer, Inc.  20525 Mariani Ave, MS 32E  Cupertino, CA 95014
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