Le 02/01/2013 09:22, Nathann Cohen a écrit :
Hellooooooooooo !!!You are totally right about the performance issue, but do you know the memory size of a Sage graph compared to dict of dict ? I have no idea -- I have just been *VERY* scared by the size of a dict of dict compared to a C array in the past. Nathann --
A similar problem exists withn sparse matrices used by scipy:; scipy builds a dict of (i,j) for all the non zero coefficients of the matrix; this is so slow that it cannot be used in any real application !
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