class SplittableRandom
Doug Lea
dl at cs.oswego.edu
Mon Jul 15 22:46:59 UTC 2013
On 07/15/13 16:13, Martin Buchholz wrote:
> I'll be your loyal adversary today, trying to break SplittableRandom.
>
> Let's make it easier by providing a low-level constructor:
>
> /** XXXX Testing */
> public SplittableRandom(long seed, long gamma, Error XXXX) {
Now you see why we don't do that :-)
>
>
> and then we have sneaky test using weakest args: seed = 0, gamma = 16
Which you would otherwise run into once every 2^64 splits.
So, rarely. you get some not-very-random-looking randoms.
Which is also what you'd expect under a truly random RNG.
-Doug
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