tree c10d387b62c0e41d78fb093238cf2b1b9c692517
parent 447a159532efe56c676c00de1b84d9b5ce5b700b
author Rob Pike <r@golang.org> 1569906657 +1000
committer Rob Pike <r@golang.org> 1569989204 +0000

rand: apply 'de-virtualization' optimization from math/rand

https://golang.org/cl/19153{8,9} and sped up things by removing a closure
call. It doesn't help here, perhaps because the compiler isn't aware.

BenchmarkRead3-4                 10.7          11.5          +7.48%
BenchmarkRead64-4                113           112           -0.88%
BenchmarkRead1000-4              1608          1588          -1.24%

Part of the reduced improvement is because the compiler doesn't
know about exp/rand (yet).

Update golang/go#34614

Change-Id: Ia439c60d69c30a25d35f21675d60601dbdc98f4f
Reviewed-on: https://go-review.googlesource.com/c/exp/+/198099
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Rob Pike <r@golang.org>
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>