denyhosts/clamav/libclamav_rust/.cargo/vendor/lebe/benches/benches.rs

137 lines
4.1 KiB
Rust

#[macro_use]
extern crate bencher;
use bencher::Bencher;
use lebe::prelude::*;
use byteorder::{ReadBytesExt, LittleEndian, BigEndian, WriteBytesExt};
use std::io::{Read, Write, Cursor};
const COUNT_8: usize = 2048;
const COUNT_16: usize = COUNT_8 / 2;
const COUNT_32: usize = COUNT_8 / 4;
const COUNT_64: usize = COUNT_8 / 8;
fn bytes(count: usize) -> Cursor<Vec<u8>> {
let vec: Vec<u8> = (0..count).map(|i| (i % 256) as u8).collect();
Cursor::new(vec)
}
fn floats(count: usize) -> Vec<f32> {
(0..count).map(|i| i as f32).collect()
}
fn read_slice_f32_le_crate(bench: &mut Bencher) {
bench.iter(move ||{
let mut target = vec![ 0_f32; COUNT_32 ];
bencher::black_box(bytes(COUNT_8).read_from_little_endian_into(target.as_mut_slice())).unwrap();
bencher::black_box(target);
})
}
fn read_slice_f32_le_byteorder(bench: &mut Bencher) {
bench.iter(move ||{
let mut target = vec![ 0_f32; COUNT_32 ];
bencher::black_box(bytes(COUNT_8).read_f32_into::<LittleEndian>(target.as_mut_slice())).unwrap();
bencher::black_box(target);
})
}
fn read_slice_f32_be_crate(bench: &mut Bencher) {
bench.iter(move ||{
let mut target = vec![ 0_f32; COUNT_32 ];
bencher::black_box(bytes(COUNT_8).read_from_big_endian_into(target.as_mut_slice())).unwrap();
bencher::black_box(target);
})
}
fn read_slice_f32_be_byteorder(bench: &mut Bencher) {
bench.iter(move ||{
let mut target = vec![ 0_f32; COUNT_32 ];
bencher::black_box(bytes(COUNT_8).read_f32_into::<BigEndian>(target.as_mut_slice())).unwrap();
bencher::black_box(target);
})
}
// FIXME faster than baseline?!?!!
fn write_slice_f32_le_crate(bench: &mut Bencher) {
bench.iter(move ||{
let data = floats(COUNT_32);
let mut output = Vec::with_capacity(COUNT_8);
bencher::black_box(output.write_as_little_endian(data.as_slice())).unwrap();
assert_eq!(output.len(), COUNT_8);
bencher::black_box(output);
})
}
fn write_slice_f32_le_byteorder(bench: &mut Bencher) {
bench.iter(move ||{
let data = floats(COUNT_32);
let mut output = Vec::with_capacity(COUNT_8);
for number in data {
bencher::black_box(output.write_f32::<LittleEndian>(number)).unwrap();
}
assert_eq!(output.len(), COUNT_8);
bencher::black_box(output);
})
}
fn write_slice_f32_be_crate(bench: &mut Bencher) {
bench.iter(move ||{
let data = floats(COUNT_32);
let mut output = Vec::with_capacity(COUNT_8);
bencher::black_box(output.write_as_big_endian(data.as_slice())).unwrap();
assert_eq!(output.len(), COUNT_8);
bencher::black_box(output);
})
}
fn write_slice_f32_be_byteorder(bench: &mut Bencher) {
bench.iter(move ||{
let data = floats(COUNT_32);
let mut output = Vec::with_capacity(COUNT_8);
for number in data {
bencher::black_box(output.write_f32::<BigEndian>(number)).unwrap();
}
assert_eq!(output.len(), COUNT_8);
bencher::black_box(output);
})
}
fn read_slice_baseline(bench: &mut Bencher) {
bench.iter(move ||{
let mut target = vec![ 0_u8; COUNT_8 ];
bencher::black_box(bytes(COUNT_8).read_exact(target.as_mut_slice())).unwrap();
bencher::black_box(target);
})
}
fn write_slice_baseline(bench: &mut Bencher) {
bench.iter(move ||{
let data = bytes(COUNT_8).into_inner();
let mut output = Vec::with_capacity(COUNT_8);
bencher::black_box(output.write_all(data.as_slice())).unwrap();
bencher::black_box(output);
})
}
benchmark_group!(
benches,
read_slice_f32_be_byteorder, read_slice_f32_be_crate, read_slice_f32_le_byteorder,
read_slice_f32_le_crate, write_slice_f32_le_byteorder, write_slice_f32_le_crate,
write_slice_f32_be_byteorder, write_slice_f32_be_crate,
read_slice_baseline, write_slice_baseline
);
benchmark_main!(benches);