Minor erratum:

Stephen J. Turnbull writes:

 > Emacs hasn't made that choice, XEmacs did.  I believe Emacs is still
 > "restricted" to 128MB, or maybe 256MB, buffers.  They recently had an
 > opportunity to increase integer size, and thus maximum buffer size,
 > but refused it.  It's not a no-brainer.

I stand corrected.  Emacs did make some changes which increased
integer size from 28 bits to 30, allowing a maximum signed value of
512M, but refused the tradeoff I described of making the cons type be
indicated by a pointer to a type description record rather than a type
bit in one of the pointers.  That would have allowed 31 bits for
integers, as in XEmacs.  The basic thrust of my argument was correct,
though.

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