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James Tucker 24bac27632 util/rands: add Shuffle and Perm functions with on-stack RNG state ... The new math/rand/v2 package includes an m-local global random number generator that can not be reseeded by the user, which is suitable for most uses without the RNG pools we have in a number of areas of the code base. The new API still does not have an allocation-free way of performing a seeded operations, due to the long term compiler bug around interface parameter escapes, and the Source interface. This change introduces the two APIs that math/rand/v2 can not yet replace efficiently: seeded Perm() and Shuffle() operations. This implementation chooses to use the PCG random source from math/rand/v2, as with sufficient compiler optimization, this source should boil down to only two on-stack registers for random state under ideal conditions. Updates #17243 Signed-off-by: James Tucker <james@tailscale.com>		2 years ago
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cheap.go	util/rands: add Shuffle and Perm functions with on-stack RNG state	2 years ago
cheap_test.go	util/rands: add Shuffle and Perm functions with on-stack RNG state	2 years ago
rands.go	util/rands: add package with HexString func	3 years ago
rands_test.go	util/rands: add package with HexString func	3 years ago