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+
+		What is this?
+		-------------
+This package is a memory allocator for the Macintosh. It was initially
+implemented for use with the MetroWerks CodeWarrior compiler on the
+PowerPC Mac, but may also be useful (in a more limited way) for use
+with MW 68K or Think compilers.
+
+This is distribution 1.0, dated April 19, 1995.
+
+		How does it work?
+		-----------------
+Actually, 99% of the code comes straight from the old old BSD-unix
+"fast malloc", only the interface to the low-level memory allocator
+and the handling of large blocks is different. The allocator follows
+one of two strategies, based upon block size:
+- for small blocks (anything up to 8K, as distributed), the size is
+  rounded up to the next power of two, and that much is
+  allocated. Realloc, etc. understand about this. Small blocks are
+  packed into 8K segments.
+- Larger blocks are allocated directly using NewPtr().
+
+		Why should I want it?
+		---------------------
+The reason for writing this is that I've had serious problems with MW
+malloc, especially in one piece of software, the Python
+interpreter. Python is a very-high level interpreted language, and
+spends very large amounts of time in malloc. Moreover, it reallocs()
+like there's no tomorrow, and allocates and frees tiny and huge blocks
+intermixedly. After some time running, this caused two things (using
+the original MW malloc): memory useage grew exponentially and so did
+runtime. MetroWerks have tried to be helpful, but I have been unable
+to provide them with simple sample-programs that showed the problem:
+it seems to be something to do with fragmentation and only happens
+under very heavy use.
+
+The 68K MW malloc has the same problems, and the Think C malloc
+has a similar one: it shows the same growth problem but not the
+increase in runtime.
+
+Two additional reasons for using it:
+- It is blindingly fast.
+- It has pretty good range checking and such (enabled with a #define),
+  so it'll help you catch various programming errors like referencing
+  outside the bounds of the malloced block.
+
+One reason for not using it:
+- It is rather wasteful of memory. Small blocks, on average, occupy
+  25% more memory than they need, and the allocation in 8K chunks
+  wastes another 50K (on average). Also, memory is never returned from
+  malloc()s pool to the Memory Manager.
+  
+		How do I use it?
+		----------------
+For MW PPC: simply add the sources to your project. Due to the way the
+linker works all mallocs will use the new malloc, even the malloc
+calls that come from the libraries (if I'm informaed correctly).
+
+For MW 68K: ditto, only supposedly the library malloc calls will still
+use the original malloc. The two packages don't bite each other,
+however, so there shouldn't be any problems.
+
+For Think: more work, but you can rebuild the ANSI library with this
+malloc, since the Think distribution contains everything you need for
+this.
+
+		Is that all?
+		------------
+
+Yes. Let me finish off by asking that you send bug reports, fixes,
+enhancement, etc to me at the address below.
+
+				Jack Jansen
+				Centrum voor Wiskunde en Informatica
+				Kruislaan 413
+				1098 SJ  Amsterdam
+				the Netherlands
+
+				<Jack.Jansen@cwi.nl>
+