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|
#![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());
});
}
|
