Rachel-Mikel ArceJaeger, 26.05.2011 17:46:
A couple small things that will help improve memory managementRather than avg = sumall / count; return avg; Just return sumall/count instead. Then you don't have to waste a register or assignment operation. Division is expensive. Avoid it when you can. Here, for (a=0; a != count; a++) { temp = PyFloat_AsDouble(PySequence_Fast_GET_ITEM(seq,a)); sumall += temp; Again, save variables and operations. Write this as: for (a=0; a != count; a++) { sumall += PyFloat_AsDouble(PySequence_Fast_GET_ITEM(seq,a)); Similar corrections in var() It's cheaper when you're using powers of two to just right or left-shift:>> or<<. Since you want to increase by a power of two, do: (avg - PyFloat_AsDouble(PySequence_Fast_GET_ITEM(seq,a)<< 1; // This means (...)^(2^1) Division by powers of two is>>. Note that these only works for powers of two.
Oh please! You are seriously insulting my C compiler here. Believe me, it's a *lot* smarter than this.
None of this is even faintly necessary. Stefan _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
