Add an sfmt19937 benchmark
authorChristopher Dykes <cdykes@fb.com>
Tue, 11 Jul 2017 20:45:18 +0000 (13:45 -0700)
committerFacebook Github Bot <facebook-github-bot@users.noreply.github.com>
Tue, 11 Jul 2017 20:51:09 +0000 (13:51 -0700)
commit4169222e2f6da6ab300df01df71a46e6a1c38eac
treef45244a4bd38b889d5e4412b7fb3b6599907d0fd
parent3f97ccef159880fc4517d9da5f9215e3b79003dd
Add an sfmt19937 benchmark

Summary: `__gnu_cxx::sfmt19937` is 3.5x faster than `std::mt19937` according to the benchmark.

Reviewed By: yfeldblum

Differential Revision: D5393697

fbshipit-source-id: bc725838dc7f62d030c7e68bc6d229042df2b46c
folly/test/RandomBenchmark.cpp