| #![feature(test)] |
| |
| extern crate test; |
| extern crate rand; |
| |
| const RAND_BENCH_N: u64 = 1000; |
| const BYTES_LEN: usize = 1024; |
| |
| use std::mem::size_of; |
| use test::{black_box, Bencher}; |
| |
| use rand::{Rng, StdRng, OsRng, JitterRng}; |
| use rand::{XorShiftRng, IsaacRng, Isaac64Rng, ChaChaRng}; |
| |
| macro_rules! gen_bytes { |
| ($fnn:ident, $gen:ident) => { |
| #[bench] |
| fn $fnn(b: &mut Bencher) { |
| let mut rng: $gen = OsRng::new().unwrap().gen(); |
| let mut buf = [0u8; BYTES_LEN]; |
| b.iter(|| { |
| for _ in 0..RAND_BENCH_N { |
| rng.fill_bytes(&mut buf); |
| black_box(buf); |
| } |
| }); |
| b.bytes = BYTES_LEN as u64 * RAND_BENCH_N; |
| } |
| } |
| } |
| |
| macro_rules! gen_bytes_new { |
| ($fnn:ident, $gen:ident) => { |
| #[bench] |
| fn $fnn(b: &mut Bencher) { |
| let mut rng = $gen::new().unwrap(); |
| let mut buf = [0u8; BYTES_LEN]; |
| b.iter(|| { |
| for _ in 0..RAND_BENCH_N { |
| rng.fill_bytes(&mut buf); |
| black_box(buf); |
| } |
| }); |
| b.bytes = BYTES_LEN as u64 * RAND_BENCH_N; |
| } |
| } |
| } |
| |
| gen_bytes!(gen_bytes_xorshift, XorShiftRng); |
| gen_bytes!(gen_bytes_isaac, IsaacRng); |
| gen_bytes!(gen_bytes_isaac64, Isaac64Rng); |
| gen_bytes!(gen_bytes_chacha, ChaChaRng); |
| gen_bytes_new!(gen_bytes_std, StdRng); |
| gen_bytes_new!(gen_bytes_os, OsRng); |
| |
| |
| macro_rules! gen_uint { |
| ($fnn:ident, $ty:ty, $gen:ident) => { |
| #[bench] |
| fn $fnn(b: &mut Bencher) { |
| let mut rng: $gen = OsRng::new().unwrap().gen(); |
| b.iter(|| { |
| for _ in 0..RAND_BENCH_N { |
| black_box(rng.gen::<$ty>()); |
| } |
| }); |
| b.bytes = size_of::<$ty>() as u64 * RAND_BENCH_N; |
| } |
| } |
| } |
| |
| macro_rules! gen_uint_new { |
| ($fnn:ident, $ty:ty, $gen:ident) => { |
| #[bench] |
| fn $fnn(b: &mut Bencher) { |
| let mut rng = $gen::new().unwrap(); |
| b.iter(|| { |
| for _ in 0..RAND_BENCH_N { |
| black_box(rng.gen::<$ty>()); |
| } |
| }); |
| b.bytes = size_of::<$ty>() as u64 * RAND_BENCH_N; |
| } |
| } |
| } |
| |
| gen_uint!(gen_u32_xorshift, u32, XorShiftRng); |
| gen_uint!(gen_u32_isaac, u32, IsaacRng); |
| gen_uint!(gen_u32_isaac64, u32, Isaac64Rng); |
| gen_uint!(gen_u32_chacha, u32, ChaChaRng); |
| gen_uint_new!(gen_u32_std, u32, StdRng); |
| gen_uint_new!(gen_u32_os, u32, OsRng); |
| |
| gen_uint!(gen_u64_xorshift, u64, XorShiftRng); |
| gen_uint!(gen_u64_isaac, u64, IsaacRng); |
| gen_uint!(gen_u64_isaac64, u64, Isaac64Rng); |
| gen_uint!(gen_u64_chacha, u64, ChaChaRng); |
| gen_uint_new!(gen_u64_std, u64, StdRng); |
| gen_uint_new!(gen_u64_os, u64, OsRng); |
| |
| #[bench] |
| fn gen_u64_jitter(b: &mut Bencher) { |
| let mut rng = JitterRng::new().unwrap(); |
| b.iter(|| { |
| black_box(rng.gen::<u64>()); |
| }); |
| b.bytes = size_of::<u64>() as u64; |
| } |
| |
| macro_rules! init_gen { |
| ($fnn:ident, $gen:ident) => { |
| #[bench] |
| fn $fnn(b: &mut Bencher) { |
| let mut rng: XorShiftRng = OsRng::new().unwrap().gen(); |
| b.iter(|| { |
| let r2: $gen = rng.gen(); |
| black_box(r2); |
| }); |
| } |
| } |
| } |
| |
| init_gen!(init_xorshift, XorShiftRng); |
| init_gen!(init_isaac, IsaacRng); |
| init_gen!(init_isaac64, Isaac64Rng); |
| init_gen!(init_chacha, ChaChaRng); |
| |
| #[bench] |
| fn init_jitter(b: &mut Bencher) { |
| b.iter(|| { |
| black_box(JitterRng::new().unwrap()); |
| }); |
| } |