Status: New
Owner: ----
New issue 3127 by [email protected]: Math.random RNG bias
http://code.google.com/p/v8/issues/detail?id=3127
Tried this repeatedly in d8 [version 3.21.17], nodejs 0.10.25 and various
versions of google chrome:
d8> Array.apply(null, Array(10000)).reduce(function(a){ return a +
(Math.floor(Math.random() * (Math.pow(2,33) + 1)) % 2)}, 0)
0
This does not appear to be a sign / integer overflow issue, given that each
value is nonnegative:
d8> Array.apply(null, Array(10000)).reduce(function(a){ return a +
((Math.floor(Math.random() * (Math.pow(2,33) + 1)) % 2)<0?1:0)}, 0)
0
Writing out each number in a sample run, every sample has even integral part
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