tree b66b1f061d8dead32e57a17854ba55f6541a9d6e
parent 580d30bf16c32ff38311e3100ab6263b3cd1a030
author vasilvv <vasilvv@google.com> 1556318875 -0700
committer Copybara-Service <copybara-worker@google.com> 1556318977 -0700

Make SimpleRandom faster by using Chacha20 as underlying primitive.

This does alter the output of the RNG, but that's a one-time cost, and one SHA-1 call per byte is highly suboptimal for anything but very short unit tests.

gfe-relnote: n/a (test-only change)
PiperOrigin-RevId: 245501012
Change-Id: I16d9f5b174ef65cfb4ece3ef0699bf1b29b81de5