Summation based benchmark for calculators

[lrdheat]

I tried the simplest summation, sum of x from x=1 through x=500,000 on my TI 36X Pro, the European edition of the 36X Pro (TI-30X Pro MathPrint), my version A Prime from 5 or 6 years ago?, and the Prime G2 that I got Sunday at BB in Laredo!

36X: ~1 hour 45 minutes
30X: 18 minutes 45 seconds
Prime A: ~8 seconds
Prime G2: ~3.5 seconds (of course, in CAS, the answer appears instantly)