Add more efficient Int32 Shuffling #168
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Replaces the previous shuffle method with a version that operates on
int32instead ofintin Dafny, that is,intinstead ofBigIntegerin Java. Tests have shown that this leads to a speed-up as it avoids previously present conversions betweenBigIntegerandint. The new method lifts a newly required external methodUniformSample32, which operates onint32(in Dafny). All other methods (that is, samplers) keep liftingUniformPowerOfTwoSample, which operates onint(in Dafny).By submitting this pull request, I confirm that my contribution is made under the terms of the MIT license.