switch to XoShiRo256++ random #2747
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What
Switches from
XSTRtoXoShiRo256++as the random generator implementation used by GT.In testing,
256++was found to be effectively equal or better in terms of speed, and most likely also has better randomness.Implementation Details
SplitMix64is used to generate the 256 bits of state for256++, it should not be used for actual random number generation.XoRoShiRo128+is used to generate random seeds for other PRNG implementations when created without an initial seed. It is not exposed elsewhere, and should not be used for any other purpose.