Has there been historical work done to investigate small integer optimization?

[Torbjörn Granlund]

marco.bodrato at tutanota.com writes:

  But implementing it with the current mpz type is "impossible".
  I mean, one should break the current interface.
  Currently, _mp_d is always a pointer AND it always point to a readable limb. Even if _mp_alloc is zero.

If we set alloc = 0 and size >= 2^30, then that means the the pointer
field is actually a numeric value, and perhaps the low 30 bits of the
size field is more bits for the numeric value.  :-)

-- 
Torbjörn
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