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- Newsgroups: comp.lang.postscript
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!eng.ufl.edu!manta!zzang
- From: zzang@stat.ufl.edu (zzang)
- Subject: VM questions in Blue Book
- Message-ID: <1992Nov22.023126.825@eng.ufl.edu>
- Originator: zzang@manta
- Sender: news@eng.ufl.edu (Usenet Diskhog System)
- Organization: University of Florida
- Distribution: usa
- Date: Sun, 22 Nov 92 02:31:26 GMT
- Lines: 38
-
- Hello,
- I am reading the Blue Book, and I like
- it very much. but it is hard for me
- to understand the virtual memory.
- what is the virtual memory, is it
- something about the disk spaces used
- by the program to extend the RAM
- capability?
-
- here is the example from the book:
- (Copyright by Adobe)
-
- 1:
- /localdict 1 dict def
- /sampleproc
- { localdict begin
- /localvariable 6 def
- end
- } def
-
- 2:
- /sampleproc
- { 1 dict begin %this allocates new VM each time
- /localvariable 6 def
- end
- } def
-
-
- the book says the 2nd procedure will use more memory.
- but they look the same to me, I am totally confused.
- could someone explain this.
-
- Thanks very much in advance!
-
- --
- Zhuo Zang[~{j0WA~}]
- Department of Statistics
- University of Florida Email: zzang@stat.ufl.edu
-