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include benches for crc crate software implementation to compare against crc32c #45

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include benches for crc crate software implementation to compare against crc32c #45

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8 changes: 3 additions & 5 deletions Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -17,8 +17,9 @@ exclude = [
build = "build.rs"

[dev-dependencies]
rand = { version ="0.8", features=["alloc", "getrandom"] }
criterion = "0.4"
rand = { version = "0.8", features = ["alloc", "getrandom"] }
criterion = "0.5"
crc = "3.0.1"

[build-dependencies]
rustc_version = "0.4"
Expand All @@ -27,6 +28,3 @@ rustc_version = "0.4"
name = "rand"
path = "benches/rand.rs"
harness = false

[target.aarch64-unknown-linux-gnu]
linker = "aarch64-linux-gnu-gcc"
93 changes: 47 additions & 46 deletions benches/rand.rs
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Original file line number Diff line number Diff line change
@@ -1,96 +1,97 @@
#[macro_use]
extern crate criterion;
extern crate crc32c;
extern crate rand;

use crc::{Crc, CRC_32_ISCSI};
use crc32c::{crc32c, crc32c_append, crc32c_combine};
use criterion::{Criterion, Throughput};
use criterion::{criterion_group, criterion_main, Criterion, Throughput};
use rand::{rngs::OsRng, RngCore};

fn crc32c_megabyte(c: &mut Criterion) {
let mut bytes = [0u8; 1_000_000];
const CASTAGNOLI: Crc<u32> = Crc::<u32>::new(&CRC_32_ISCSI);
const MIB1: usize = 1024 * 1024;
const KIB8: usize = 8 * 1024;
const KIB4: usize = 4 * 1024;

fn direct_megabyte(c: &mut Criterion) {
let mut bytes = [0u8; MIB1];
OsRng.fill_bytes(&mut bytes);

let mut group = c.benchmark_group("crc32_update_megabytes");
group.throughput(Throughput::Bytes(1_000_000));
group.bench_function("crc32_update_megabytes", move |b| b.iter(|| crc32c(&bytes)));
let mut group = c.benchmark_group("1MiB");
group.throughput(Throughput::Bytes(MIB1 as u64));
group.bench_function("crc32c", move |b| b.iter(|| crc32c(&bytes)));
group.bench_function("crc_crate", move |b| b.iter(|| CASTAGNOLI.checksum(&bytes)));
group.finish();
}

fn crc32c_8kb(c: &mut Criterion) {
let mut buffer = [0u8; 8192];
OsRng.fill_bytes(&mut buffer);
fn direct_8kib(c: &mut Criterion) {
let mut bytes = [0u8; KIB8];
OsRng.fill_bytes(&mut bytes);

let mut group = c.benchmark_group("crc32c_8kb");
group.throughput(Throughput::Bytes(8192));
group.bench_function("crc32c_8kb", move |b| b.iter(|| crc32c(&buffer)));
let mut group = c.benchmark_group("8KiB");
group.throughput(Throughput::Bytes(KIB8 as u64));
group.bench_function("crc32c", move |b| b.iter(|| crc32c(&bytes)));
group.bench_function("crc_crate", move |b| b.iter(|| CASTAGNOLI.checksum(&bytes)));
group.finish();
}

/// benchmark combining 4KB blocks into existing check values.
fn crc32c_combine_4kb(c: &mut Criterion) {
let mut buffer = [0u8; 4096];
/// benchmark combining 4KiB blocks into existing check values.
fn combine_4kib(c: &mut Criterion) {
let mut buffer = [0u8; KIB4];
OsRng.fill_bytes(&mut buffer);

let crc_a = crc32c(b"abcd");
let crc_b = crc32c(&buffer);

let mut group = c.benchmark_group("crc32c_combine_4kb");
group.bench_function("crc32c_combine_4kb", move |b| {
let mut group = c.benchmark_group("combine_4KiB");
group.bench_function("crc32c", move |b| {
b.iter(|| crc32c_combine(crc_a, crc_b, 4096))
});
group.finish();
}

/// benchmark appending 4KB blocks to existing check values
fn crc32c_append_4kb(c: &mut Criterion) {
let mut buffer = [0u8; 4096];
/// benchmark appending 4KiB blocks to existing check values
fn append_4kib(c: &mut Criterion) {
let mut buffer = [0u8; KIB4];
OsRng.fill_bytes(&mut buffer);

let crc_a = crc32c(b"abcd");

let mut group = c.benchmark_group("crc32c_append_4kb");
group.bench_function("crc32c_append_4kb", move |b| {
b.iter(|| crc32c_append(crc_a, &buffer))
});
let mut group = c.benchmark_group("append_4KiB");
group.throughput(Throughput::Bytes(KIB4 as u64));
group.bench_function("crc32c", move |b| b.iter(|| crc32c_append(crc_a, &buffer)));
group.finish();
}

/// benchmark combining 1MB blocks into existing check values.
fn crc32c_combine_megabyte(c: &mut Criterion) {
let mut buffer = [0u8; 1_000_000];
/// benchmark combining 1MiB blocks into existing check values.
fn combine_megabyte(c: &mut Criterion) {
let mut buffer = [0u8; MIB1];
OsRng.fill_bytes(&mut buffer);

let crc_a = crc32c(b"abcd");
let crc_b = crc32c(&buffer);

let mut group = c.benchmark_group("crc32c_combine_megabyte");
group.bench_function("crc32c_combine_megabyte", move |b| {
let mut group = c.benchmark_group("combine_1MiB");
group.bench_function("crc32c", move |b| {
b.iter(|| crc32c_combine(crc_a, crc_b, 1_000_000))
});
group.finish();
}

fn crc32c_append_megabyte(c: &mut Criterion) {
let mut buffer = [0u8; 1_000_000];
fn append_megabyte(c: &mut Criterion) {
let mut buffer = [0u8; MIB1];
OsRng.fill_bytes(&mut buffer);

let crc_a = crc32c(b"abcd");

let mut group = c.benchmark_group("crc32c_append_megabyte");
group.bench_function("crc32c_append_megabyte", move |b| {
b.iter(|| crc32c_append(crc_a, &buffer))
});
let mut group = c.benchmark_group("append_1MiB");
group.throughput(Throughput::Bytes(MIB1 as u64));
group.bench_function("crc32c", move |b| b.iter(|| crc32c_append(crc_a, &buffer)));
group.finish();
}

criterion_group!(
crc,
crc32c_megabyte,
crc32c_8kb,
crc32c_append_4kb,
crc32c_combine_4kb,
crc32c_combine_megabyte,
crc32c_append_megabyte
direct_megabyte,
direct_8kib,
append_4kib,
combine_4kib,
combine_megabyte,
append_megabyte
);
criterion_main!(crc);