Remove old RNG crates from benchmarks

Note: the init benches now use a different master RNG;
this appears to have little affect on results.

Author: dhardy

benches/generators.rs

@@ -20,14 +20,9 @@ use test::{black_box, Bencher};
 use rand::prelude::*;
 use rand::rngs::adapter::ReseedingRng;
 use rand::rngs::{OsRng, mock::StepRng};
-use rand_isaac::{IsaacRng, Isaac64Rng};
 use rand_chacha::{ChaCha20Core, ChaCha8Rng, ChaCha12Rng, ChaCha20Rng};
 use rand_hc::{Hc128Rng};
 use rand_pcg::{Pcg32, Pcg64, Pcg64Mcg};
-use rand_xorshift::XorShiftRng;
-use rand_xoshiro::{Xoshiro256StarStar, Xoshiro256Plus, Xoshiro128StarStar,
-    Xoshiro128Plus, Xoroshiro128StarStar, Xoroshiro128Plus, SplitMix64,
-    Xoroshiro64StarStar, Xoroshiro64Star};
 
 macro_rules! gen_bytes {
     ($fnn:ident, $gen:expr) => {
@@ -47,25 +42,13 @@ macro_rules! gen_bytes {
 }
 
 gen_bytes!(gen_bytes_step, StepRng::new(0, 1));
-gen_bytes!(gen_bytes_xorshift, XorShiftRng::from_entropy());
-gen_bytes!(gen_bytes_xoshiro256starstar, Xoshiro256StarStar::from_entropy());
-gen_bytes!(gen_bytes_xoshiro256plus, Xoshiro256Plus::from_entropy());
-gen_bytes!(gen_bytes_xoshiro128starstar, Xoshiro128StarStar::from_entropy());
-gen_bytes!(gen_bytes_xoshiro128plus, Xoshiro128Plus::from_entropy());
-gen_bytes!(gen_bytes_xoroshiro128starstar, Xoroshiro128StarStar::from_entropy());
-gen_bytes!(gen_bytes_xoroshiro128plus, Xoroshiro128Plus::from_entropy());
-gen_bytes!(gen_bytes_xoroshiro64starstar, Xoroshiro64StarStar::from_entropy());
-gen_bytes!(gen_bytes_xoroshiro64star, Xoroshiro64Star::from_entropy());
-gen_bytes!(gen_bytes_splitmix64, SplitMix64::from_entropy());
 gen_bytes!(gen_bytes_pcg32, Pcg32::from_entropy());
 gen_bytes!(gen_bytes_pcg64, Pcg64::from_entropy());
 gen_bytes!(gen_bytes_pcg64mcg, Pcg64Mcg::from_entropy());
 gen_bytes!(gen_bytes_chacha8, ChaCha8Rng::from_entropy());
 gen_bytes!(gen_bytes_chacha12, ChaCha12Rng::from_entropy());
 gen_bytes!(gen_bytes_chacha20, ChaCha20Rng::from_entropy());
 gen_bytes!(gen_bytes_hc128, Hc128Rng::from_entropy());
-gen_bytes!(gen_bytes_isaac, IsaacRng::from_entropy());
-gen_bytes!(gen_bytes_isaac64, Isaac64Rng::from_entropy());
 gen_bytes!(gen_bytes_std, StdRng::from_entropy());
 #[cfg(feature="small_rng")]
 gen_bytes!(gen_bytes_small, SmallRng::from_entropy());
@@ -89,50 +72,26 @@ macro_rules! gen_uint {
 }
 
 gen_uint!(gen_u32_step, u32, StepRng::new(0, 1));
-gen_uint!(gen_u32_xorshift, u32, XorShiftRng::from_entropy());
-gen_uint!(gen_u32_xoshiro256starstar, u32, Xoshiro256StarStar::from_entropy());
-gen_uint!(gen_u32_xoshiro256plus, u32, Xoshiro256Plus::from_entropy());
-gen_uint!(gen_u32_xoshiro128starstar, u32, Xoshiro128StarStar::from_entropy());
-gen_uint!(gen_u32_xoshiro128plus, u32, Xoshiro128Plus::from_entropy());
-gen_uint!(gen_u32_xoroshiro128starstar, u32, Xoroshiro128StarStar::from_entropy());
-gen_uint!(gen_u32_xoroshiro128plus, u32, Xoroshiro128Plus::from_entropy());
-gen_uint!(gen_u32_xoroshiro64starstar, u32, Xoroshiro64StarStar::from_entropy());
-gen_uint!(gen_u32_xoroshiro64star, u32, Xoroshiro64Star::from_entropy());
-gen_uint!(gen_u32_splitmix64, u32, SplitMix64::from_entropy());
 gen_uint!(gen_u32_pcg32, u32, Pcg32::from_entropy());
 gen_uint!(gen_u32_pcg64, u32, Pcg64::from_entropy());
 gen_uint!(gen_u32_pcg64mcg, u32, Pcg64Mcg::from_entropy());
 gen_uint!(gen_u32_chacha8, u32, ChaCha8Rng::from_entropy());
 gen_uint!(gen_u32_chacha12, u32, ChaCha12Rng::from_entropy());
 gen_uint!(gen_u32_chacha20, u32, ChaCha20Rng::from_entropy());
 gen_uint!(gen_u32_hc128, u32, Hc128Rng::from_entropy());
-gen_uint!(gen_u32_isaac, u32, IsaacRng::from_entropy());
-gen_uint!(gen_u32_isaac64, u32, Isaac64Rng::from_entropy());
 gen_uint!(gen_u32_std, u32, StdRng::from_entropy());
 #[cfg(feature="small_rng")]
 gen_uint!(gen_u32_small, u32, SmallRng::from_entropy());
 gen_uint!(gen_u32_os, u32, OsRng);
 
 gen_uint!(gen_u64_step, u64, StepRng::new(0, 1));
-gen_uint!(gen_u64_xorshift, u64, XorShiftRng::from_entropy());
-gen_uint!(gen_u64_xoshiro256starstar, u64, Xoshiro256StarStar::from_entropy());
-gen_uint!(gen_u64_xoshiro256plus, u64, Xoshiro256Plus::from_entropy());
-gen_uint!(gen_u64_xoshiro128starstar, u64, Xoshiro128StarStar::from_entropy());
-gen_uint!(gen_u64_xoshiro128plus, u64, Xoshiro128Plus::from_entropy());
-gen_uint!(gen_u64_xoroshiro128starstar, u64, Xoroshiro128StarStar::from_entropy());
-gen_uint!(gen_u64_xoroshiro128plus, u64, Xoroshiro128Plus::from_entropy());
-gen_uint!(gen_u64_xoroshiro64starstar, u64, Xoroshiro64StarStar::from_entropy());
-gen_uint!(gen_u64_xoroshiro64star, u64, Xoroshiro64Star::from_entropy());
-gen_uint!(gen_u64_splitmix64, u64, SplitMix64::from_entropy());
 gen_uint!(gen_u64_pcg32, u64, Pcg32::from_entropy());
 gen_uint!(gen_u64_pcg64, u64, Pcg64::from_entropy());
 gen_uint!(gen_u64_pcg64mcg, u64, Pcg64Mcg::from_entropy());
 gen_uint!(gen_u64_chacha8, u64, ChaCha8Rng::from_entropy());
 gen_uint!(gen_u64_chacha12, u64, ChaCha12Rng::from_entropy());
 gen_uint!(gen_u64_chacha20, u64, ChaCha20Rng::from_entropy());
 gen_uint!(gen_u64_hc128, u64, Hc128Rng::from_entropy());
-gen_uint!(gen_u64_isaac, u64, IsaacRng::from_entropy());
-gen_uint!(gen_u64_isaac64, u64, Isaac64Rng::from_entropy());
 gen_uint!(gen_u64_std, u64, StdRng::from_entropy());
 #[cfg(feature="small_rng")]
 gen_uint!(gen_u64_small, u64, SmallRng::from_entropy());
@@ -142,7 +101,7 @@ macro_rules! init_gen {
     ($fnn:ident, $gen:ident) => {
         #[bench]
         fn $fnn(b: &mut Bencher) {
-            let mut rng = XorShiftRng::from_entropy();
+            let mut rng = Pcg32::from_entropy();
             b.iter(|| {
                 let r2 = $gen::from_rng(&mut rng).unwrap();
                 r2
@@ -151,22 +110,10 @@ macro_rules! init_gen {
     }
 }
 
-init_gen!(init_xorshift, XorShiftRng);
-init_gen!(init_xoshiro256starstar, Xoshiro256StarStar);
-init_gen!(init_xoshiro256plus, Xoshiro256Plus);
-init_gen!(init_xoshiro128starstar, Xoshiro128StarStar);
-init_gen!(init_xoshiro128plus, Xoshiro128Plus);
-init_gen!(init_xoroshiro128starstar, Xoroshiro128StarStar);
-init_gen!(init_xoroshiro128plus, Xoroshiro128Plus);
-init_gen!(init_xoroshiro64starstar, Xoroshiro64StarStar);
-init_gen!(init_xoroshiro64star, Xoroshiro64Star);
-init_gen!(init_splitmix64, SplitMix64);
 init_gen!(init_pcg32, Pcg32);
 init_gen!(init_pcg64, Pcg64);
 init_gen!(init_pcg64mcg, Pcg64Mcg);
 init_gen!(init_hc128, Hc128Rng);
-init_gen!(init_isaac, IsaacRng);
-init_gen!(init_isaac64, Isaac64Rng);
 init_gen!(init_chacha, ChaCha20Rng);
 
 const RESEEDING_BYTES_LEN: usize = 1024 * 1024;

rand_core/src/lib.rs

@@ -353,7 +353,6 @@ pub trait SeedableRng: Sized {
     /// (in prior versions this was not required).
     ///
     /// [`rand`]: https://docs.rs/rand
-    /// [`rand_os`]: https://docs.rs/rand_os
     fn from_rng<R: RngCore>(mut rng: R) -> Result<Self, Error> {
         let mut seed = Self::Seed::default();
         rng.try_fill_bytes(seed.as_mut())?;

rand_core/src/os.rs

@@ -7,7 +7,6 @@
 // except according to those terms.
 
 //! Interface to the random number generator of the operating system.
-// Note: keep this code in sync with the rand_os crate!
 
 use getrandom::getrandom;
 use crate::{CryptoRng, RngCore, Error, impls};