[issue21305] PEP 466: update os.urandom

[Antoine Pitrou]

Antoine Pitrou added the comment:

> It's not a security issue per-se, but if you're doing many small
> reads, there's such an enormous performance and scalability difference
> that if users run into an issue, they're likely to work around it by
> using a non-CS PRNG, and compromising their application security.

Do you have any examples of this or is it just a gratuitous inference?

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