Summation based benchmark for calculators

[John Keith]

Amusingly, I ran the benchmark last night on the same model phone. I used the program from post # 47 and I got
339 milliseconds for 1000
3.295 seconds for 10,000
32.0 seconds for 100,000.

On an older Windows 7 laptop (Core i5 2.4Ghz.) I got 4.93s and 48.2s respectively. Using XROOT instead of 3. INV ^ decreased run times by about 2%.

On my newly acquired HP-28S, I get 13.2 seconds for 100, 123 seconds for 1000.