Interesting. C++ and Java are very near on my machine:

    java Prime
    9592 primes between 0 and 100000
    Time taken = 18.484
    9592 primes between 0 and 100000
    Time taken = 18.25
    9592 primes between 0 and 100000
    Time taken = 18.087
    ...

C++: https://news.ycombinator.com/item?id=11412820