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JulesKouatchou / basic_language_comparison

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Munchausen timing for Julia is probably off #10

Open mauro3 opened 3 years ago

mauro3 commented 3 years ago

I ran the https://github.com/JulesKouatchou/basic_language_comparison/blob/master/Julia/test_munchausen.jl script on my laptop and got times of 7s to 5s for Julia 0.6.4, 1.0 and 1.5. Thus the 100s on a Xenon-node seem off.

DNF2 commented 3 years ago

In the Java code, there is an early bail-out when the intermediate sum exceeds the input number. This bailout does not occur in Julia, and not in some other languages either, and makes a big difference.

Furthermore

digit = thisnumber % 10
sumofpowers += power_of_digits[digit+1]
thisnumber ÷= 10

should use divrem instead of first doing rem and later div, which is redundant.