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Marcin 'Qrczak' Kowalczyk wrote:
Any existing implementation uses any other representation by default
Well, the fixnum/bignum distinction is a bit more complicated in Kawa.
* array-based bignums: a (reference to a) gnu.math.IntNum, one of whose
fields is a reference to an array of 32-bits ints ("words").
* "small" bignums: if there is just a single word, it is stored
directly in te gnu.math.IntNum, and the array field is null.
* "cached" bignums: there is a table of pre-allocated gnu.math.IntNum
objects, representing -100..1024.
In addition, Kawa can work with unboxed Java byte/short/int/long.