是否影响程序中的 memory 消耗

Question

return sum(x for x in list)
vs 
for x in list:
   sum+=x
return sum

does 1st the statement execute faster and the memory used by both the programs is same or not. I am not able to find this answer specifically/

Answer 1

There is nearly no difference for most cases. If you are really memory constrained, use sum because it is optimised (but Python and native lists should be a bigger concern to you).