python has random.shuffle() and random.sample() with an MT Mersenne Twister PRNG for random. https://docs.python.org/3/library/random.html#random.shuffle Modules/_randommodule.c: https://github.com/python/cpython/blob/main/Modules/_randomm... , Library/random.py: https://github.com/python/cpython/blob/main/Lib/random.py#L3...

From "Uniting the Linux random-number devices" (2022) https://www.hackerneue.com/item?id=30377944 :

> > In 2020, the Linux kernel version 5.6 /dev/random only blocks when the CPRNG hasn't initialized. Once initialized, /dev/random and /dev/urandom behave the same. [17]

From https://www.hackerneue.com/item?id=37712506 :

> "lock-free concurrency" [...] "Ask HN: Why don't PCs have better entropy sources?" [for generating txids/uuids] https://www.hackerneue.com/item?id=30877296

> "100-Gbit/s Integrated Quantum Random Number Generator Based on Vacuum Fluctuations" https://link.aps.org/doi/10.1103/PRXQuantum.4.010330

google/paranoid_crypto.lib.randomness_tests: https://github.com/google/paranoid_crypto/tree/main/paranoid...