Go implementation of Melissa O'Neill's excellent PCG pseudorandom number generator, which is well-studied, excellent, and fast both to create and in execution.
Performance on a MacBook Pro:
$ go test -v -bench=.
=== RUN TestSanity32
--- PASS: TestSanity32 (0.00s)
=== RUN TestSum32
--- PASS: TestSum32 (0.00s)
=== RUN TestAdvance32
--- PASS: TestAdvance32 (0.00s)
=== RUN TestRetreat32
--- PASS: TestRetreat32 (0.00s)
=== RUN TestSanity64
--- PASS: TestSanity64 (0.00s)
=== RUN TestSum64
--- PASS: TestSum64 (0.00s)
=== RUN TestAdvance64
--- PASS: TestAdvance64 (0.00s)
=== RUN TestRetreat64
--- PASS: TestRetreat64 (0.00s)
=== RUN ExampleReport32
--- PASS: ExampleReport32 (0.00s)
=== RUN ExampleReport64
--- PASS: ExampleReport64 (0.00s)
BenchmarkNew32-8 2000000000 1.09 ns/op
BenchmarkRandom32-8 1000000000 2.49 ns/op
BenchmarkBounded32-8 200000000 9.75 ns/op
BenchmarkNew64-8 200000000 6.89 ns/op
BenchmarkRandom64-8 200000000 7.58 ns/op
BenchmarkBounded64-8 50000000 25.5 ns/op
Provided under terms of the Apache license in keeping with Melissa O'Neill's original from which this was ported.
Copyright 2018 Michael T. Jones
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.