zvault/chunking/benches/all.rs

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Rust
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2017-04-19 19:07:23 +00:00
#![feature(test)]
extern crate test;
extern crate chunking;
use chunking::*;
use std::io::{self, Write, Cursor};
use test::Bencher;
fn random_data(seed: u64, size: usize) -> Vec<u8> {
assert_eq!(size % 4, 0);
let mut data = vec![0; size];
let a = 6364136223846793005;
let c = 1442695040888963407;
let mut v = seed;
for i in 0..size/4 {
v = v.wrapping_mul(a).wrapping_add(c);
data[4*i] = ((v >> 24) & 0xff) as u8;
data[4*i+1] = ((v >> 16) & 0xff) as u8;
data[4*i+2] = ((v >> 8) & 0xff) as u8;
data[4*i+3] = (v & 0xff) as u8;
}
data
}
struct DevNull;
impl Write for DevNull {
fn write(&mut self, data: &[u8]) -> Result<usize, io::Error> {
Ok(data.len())
}
fn flush(&mut self) -> Result<(), io::Error> {
Ok(())
}
}
#[bench]
fn test_fixed_init(b: &mut Bencher) {
b.iter(|| {
FixedChunker::new(8*1024);
})
}
#[bench]
fn test_fixed_8192(b: &mut Bencher) {
let data = random_data(0, 1024*1024);
b.bytes = data.len() as u64;
b.iter(|| {
let mut chunker = FixedChunker::new(8*1024);
let mut cursor = Cursor::new(&data);
while chunker.chunk(&mut cursor, &mut DevNull).unwrap() == ChunkerStatus::Continue {}
})
}
#[bench]
fn test_ae_init(b: &mut Bencher) {
b.iter(|| {
AeChunker::new(8*1024);
})
}
#[bench]
fn test_ae_8192(b: &mut Bencher) {
let data = random_data(0, 1024*1024);
b.bytes = data.len() as u64;
b.iter(|| {
let mut chunker = AeChunker::new(8*1024);
let mut cursor = Cursor::new(&data);
while chunker.chunk(&mut cursor, &mut DevNull).unwrap() == ChunkerStatus::Continue {}
})
}
#[bench]
fn test_rabin_init(b: &mut Bencher) {
b.iter(|| {
RabinChunker::new(8*1024, 0);
})
}
#[bench]
fn test_rabin_8192(b: &mut Bencher) {
let data = random_data(0, 1024*1024);
b.bytes = data.len() as u64;
b.iter(|| {
let mut chunker = RabinChunker::new(8*1024, 0);
let mut cursor = Cursor::new(&data);
while chunker.chunk(&mut cursor, &mut DevNull).unwrap() == ChunkerStatus::Continue {}
})
}
#[bench]
fn test_fastcdc_init(b: &mut Bencher) {
b.iter(|| {
FastCdcChunker::new(8*1024, 0);
})
}
#[bench]
fn test_fastcdc_8192(b: &mut Bencher) {
let data = random_data(0, 1024*1024);
b.bytes = data.len() as u64;
b.iter(|| {
let mut chunker = FastCdcChunker::new(8*1024, 0);
let mut cursor = Cursor::new(&data);
while chunker.chunk(&mut cursor, &mut DevNull).unwrap() == ChunkerStatus::Continue {}
})
}