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remove old benchmarks

This commit is contained in:
Rob Ede 2023-03-11 23:20:02 +00:00
parent 0ba147ef71
commit 4131786127
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5 changed files with 0 additions and 555 deletions

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@ -124,19 +124,3 @@ tokio = { version = "1.24.2", features = ["net", "rt", "macros"] }
[[example]]
name = "ws"
required-features = ["ws", "rustls"]
[[bench]]
name = "write-camel-case"
harness = false
[[bench]]
name = "status-line"
harness = false
[[bench]]
name = "uninit-headers"
harness = false
[[bench]]
name = "quality-value"
harness = false

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@ -1,97 +0,0 @@
#![allow(clippy::uninlined_format_args)]
use criterion::{criterion_group, criterion_main, BenchmarkId, Criterion};
const CODES: &[u16] = &[0, 1000, 201, 800, 550];
fn bench_quality_display_impls(c: &mut Criterion) {
let mut group = c.benchmark_group("quality value display impls");
for i in CODES.iter() {
group.bench_with_input(BenchmarkId::new("New (fast?)", i), i, |b, &i| {
b.iter(|| _new::Quality(i).to_string())
});
group.bench_with_input(BenchmarkId::new("Naive", i), i, |b, &i| {
b.iter(|| _naive::Quality(i).to_string())
});
}
group.finish();
}
criterion_group!(benches, bench_quality_display_impls);
criterion_main!(benches);
mod _new {
use std::fmt;
pub struct Quality(pub(crate) u16);
impl fmt::Display for Quality {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self.0 {
0 => f.write_str("0"),
1000 => f.write_str("1"),
// some number in the range 1999
x => {
f.write_str("0.")?;
// this implementation avoids string allocation otherwise required
// for `.trim_end_matches('0')`
if x < 10 {
f.write_str("00")?;
// 0 is handled so it's not possible to have a trailing 0, we can just return
itoa_fmt(f, x)
} else if x < 100 {
f.write_str("0")?;
if x % 10 == 0 {
// trailing 0, divide by 10 and write
itoa_fmt(f, x / 10)
} else {
itoa_fmt(f, x)
}
} else {
// x is in range 101999
if x % 100 == 0 {
// two trailing 0s, divide by 100 and write
itoa_fmt(f, x / 100)
} else if x % 10 == 0 {
// one trailing 0, divide by 10 and write
itoa_fmt(f, x / 10)
} else {
itoa_fmt(f, x)
}
}
}
}
}
}
pub fn itoa_fmt<W: fmt::Write, V: itoa::Integer>(mut wr: W, value: V) -> fmt::Result {
let mut buf = itoa::Buffer::new();
wr.write_str(buf.format(value))
}
}
mod _naive {
use std::fmt;
pub struct Quality(pub(crate) u16);
impl fmt::Display for Quality {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self.0 {
0 => f.write_str("0"),
1000 => f.write_str("1"),
x => {
write!(f, "{}", format!("{:03}", x).trim_end_matches('0'))
}
}
}
}
}

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@ -1,214 +0,0 @@
use criterion::{criterion_group, criterion_main, BenchmarkId, Criterion};
use bytes::BytesMut;
use http::Version;
const CODES: &[u16] = &[201, 303, 404, 515];
fn bench_write_status_line_11(c: &mut Criterion) {
let mut group = c.benchmark_group("write_status_line v1.1");
let version = Version::HTTP_11;
for i in CODES.iter() {
group.bench_with_input(BenchmarkId::new("Original (unsafe)", i), i, |b, &i| {
b.iter(|| {
let mut b = BytesMut::with_capacity(35);
_original::write_status_line(version, i, &mut b);
})
});
group.bench_with_input(BenchmarkId::new("New (safe)", i), i, |b, &i| {
b.iter(|| {
let mut b = BytesMut::with_capacity(35);
_new::write_status_line(version, i, &mut b);
})
});
group.bench_with_input(BenchmarkId::new("Naive", i), i, |b, &i| {
b.iter(|| {
let mut b = BytesMut::with_capacity(35);
_naive::write_status_line(version, i, &mut b);
})
});
}
group.finish();
}
fn bench_write_status_line_10(c: &mut Criterion) {
let mut group = c.benchmark_group("write_status_line v1.0");
let version = Version::HTTP_10;
for i in CODES.iter() {
group.bench_with_input(BenchmarkId::new("Original (unsafe)", i), i, |b, &i| {
b.iter(|| {
let mut b = BytesMut::with_capacity(35);
_original::write_status_line(version, i, &mut b);
})
});
group.bench_with_input(BenchmarkId::new("New (safe)", i), i, |b, &i| {
b.iter(|| {
let mut b = BytesMut::with_capacity(35);
_new::write_status_line(version, i, &mut b);
})
});
group.bench_with_input(BenchmarkId::new("Naive", i), i, |b, &i| {
b.iter(|| {
let mut b = BytesMut::with_capacity(35);
_naive::write_status_line(version, i, &mut b);
})
});
}
group.finish();
}
fn bench_write_status_line_09(c: &mut Criterion) {
let mut group = c.benchmark_group("write_status_line v0.9");
let version = Version::HTTP_09;
for i in CODES.iter() {
group.bench_with_input(BenchmarkId::new("Original (unsafe)", i), i, |b, &i| {
b.iter(|| {
let mut b = BytesMut::with_capacity(35);
_original::write_status_line(version, i, &mut b);
})
});
group.bench_with_input(BenchmarkId::new("New (safe)", i), i, |b, &i| {
b.iter(|| {
let mut b = BytesMut::with_capacity(35);
_new::write_status_line(version, i, &mut b);
})
});
group.bench_with_input(BenchmarkId::new("Naive", i), i, |b, &i| {
b.iter(|| {
let mut b = BytesMut::with_capacity(35);
_naive::write_status_line(version, i, &mut b);
})
});
}
group.finish();
}
criterion_group!(
benches,
bench_write_status_line_11,
bench_write_status_line_10,
bench_write_status_line_09
);
criterion_main!(benches);
mod _naive {
use bytes::{BufMut, BytesMut};
use http::Version;
pub(crate) fn write_status_line(version: Version, n: u16, bytes: &mut BytesMut) {
match version {
Version::HTTP_11 => bytes.put_slice(b"HTTP/1.1 "),
Version::HTTP_10 => bytes.put_slice(b"HTTP/1.0 "),
Version::HTTP_09 => bytes.put_slice(b"HTTP/0.9 "),
_ => {
// other HTTP version handlers do not use this method
}
}
bytes.put_slice(n.to_string().as_bytes());
}
}
mod _new {
use bytes::{BufMut, BytesMut};
use http::Version;
const DIGITS_START: u8 = b'0';
pub(crate) fn write_status_line(version: Version, n: u16, bytes: &mut BytesMut) {
match version {
Version::HTTP_11 => bytes.put_slice(b"HTTP/1.1 "),
Version::HTTP_10 => bytes.put_slice(b"HTTP/1.0 "),
Version::HTTP_09 => bytes.put_slice(b"HTTP/0.9 "),
_ => {
// other HTTP version handlers do not use this method
}
}
let d100 = (n / 100) as u8;
let d10 = ((n / 10) % 10) as u8;
let d1 = (n % 10) as u8;
bytes.put_u8(DIGITS_START + d100);
bytes.put_u8(DIGITS_START + d10);
bytes.put_u8(DIGITS_START + d1);
bytes.put_u8(b' ');
}
}
mod _original {
use std::ptr;
use bytes::{BufMut, BytesMut};
use http::Version;
const DEC_DIGITS_LUT: &[u8] = b"0001020304050607080910111213141516171819\
2021222324252627282930313233343536373839\
4041424344454647484950515253545556575859\
6061626364656667686970717273747576777879\
8081828384858687888990919293949596979899";
pub(crate) const STATUS_LINE_BUF_SIZE: usize = 13;
pub(crate) fn write_status_line(version: Version, mut n: u16, bytes: &mut BytesMut) {
let mut buf: [u8; STATUS_LINE_BUF_SIZE] = *b"HTTP/1.1 ";
match version {
Version::HTTP_2 => buf[5] = b'2',
Version::HTTP_10 => buf[7] = b'0',
Version::HTTP_09 => {
buf[5] = b'0';
buf[7] = b'9';
}
_ => {}
}
let mut curr: isize = 12;
let buf_ptr = buf.as_mut_ptr();
let lut_ptr = DEC_DIGITS_LUT.as_ptr();
let four = n > 999;
// decode 2 more chars, if > 2 chars
let d1 = (n % 100) << 1;
n /= 100;
curr -= 2;
unsafe {
ptr::copy_nonoverlapping(lut_ptr.offset(d1 as isize), buf_ptr.offset(curr), 2);
}
// decode last 1 or 2 chars
if n < 10 {
curr -= 1;
unsafe {
*buf_ptr.offset(curr) = (n as u8) + b'0';
}
} else {
let d1 = n << 1;
curr -= 2;
unsafe {
ptr::copy_nonoverlapping(lut_ptr.offset(d1 as isize), buf_ptr.offset(curr), 2);
}
}
bytes.put_slice(&buf);
if four {
bytes.put_u8(b' ');
}
}
}

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@ -1,135 +0,0 @@
use criterion::{criterion_group, criterion_main, Criterion};
use bytes::BytesMut;
// A Miri run detects UB, seen on this playground:
// https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=f5d9aa166aa48df8dca05fce2b6c3915
fn bench_header_parsing(c: &mut Criterion) {
c.bench_function("Original (Unsound) [short]", |b| {
b.iter(|| {
let mut buf = BytesMut::from(REQ_SHORT);
_original::parse_headers(&mut buf);
})
});
c.bench_function("New (safe) [short]", |b| {
b.iter(|| {
let mut buf = BytesMut::from(REQ_SHORT);
_new::parse_headers(&mut buf);
})
});
c.bench_function("Original (Unsound) [realistic]", |b| {
b.iter(|| {
let mut buf = BytesMut::from(REQ);
_original::parse_headers(&mut buf);
})
});
c.bench_function("New (safe) [realistic]", |b| {
b.iter(|| {
let mut buf = BytesMut::from(REQ);
_new::parse_headers(&mut buf);
})
});
}
criterion_group!(benches, bench_header_parsing);
criterion_main!(benches);
const MAX_HEADERS: usize = 96;
const EMPTY_HEADER_ARRAY: [httparse::Header<'static>; MAX_HEADERS] =
[httparse::EMPTY_HEADER; MAX_HEADERS];
#[derive(Clone, Copy)]
struct HeaderIndex {
name: (usize, usize),
value: (usize, usize),
}
const EMPTY_HEADER_INDEX: HeaderIndex = HeaderIndex {
name: (0, 0),
value: (0, 0),
};
const EMPTY_HEADER_INDEX_ARRAY: [HeaderIndex; MAX_HEADERS] = [EMPTY_HEADER_INDEX; MAX_HEADERS];
impl HeaderIndex {
fn record(bytes: &[u8], headers: &[httparse::Header<'_>], indices: &mut [HeaderIndex]) {
let bytes_ptr = bytes.as_ptr() as usize;
for (header, indices) in headers.iter().zip(indices.iter_mut()) {
let name_start = header.name.as_ptr() as usize - bytes_ptr;
let name_end = name_start + header.name.len();
indices.name = (name_start, name_end);
let value_start = header.value.as_ptr() as usize - bytes_ptr;
let value_end = value_start + header.value.len();
indices.value = (value_start, value_end);
}
}
}
// test cases taken from:
// https://github.com/seanmonstar/httparse/blob/master/benches/parse.rs
const REQ_SHORT: &[u8] = b"\
GET / HTTP/1.0\r\n\
Host: example.com\r\n\
Cookie: session=60; user_id=1\r\n\r\n";
const REQ: &[u8] = b"\
GET /wp-content/uploads/2010/03/hello-kitty-darth-vader-pink.jpg HTTP/1.1\r\n\
Host: www.kittyhell.com\r\n\
User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; ja-JP-mac; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Pathtraq/0.9\r\n\
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n\
Accept-Language: ja,en-us;q=0.7,en;q=0.3\r\n\
Accept-Encoding: gzip,deflate\r\n\
Accept-Charset: Shift_JIS,utf-8;q=0.7,*;q=0.7\r\n\
Keep-Alive: 115\r\n\
Connection: keep-alive\r\n\
Cookie: wp_ozh_wsa_visits=2; wp_ozh_wsa_visit_lasttime=xxxxxxxxxx; __utma=xxxxxxxxx.xxxxxxxxxx.xxxxxxxxxx.xxxxxxxxxx.xxxxxxxxxx.x; __utmz=xxxxxxxxx.xxxxxxxxxx.x.x.utmccn=(referral)|utmcsr=reader.livedoor.com|utmcct=/reader/|utmcmd=referral|padding=under256\r\n\r\n";
mod _new {
use super::*;
pub fn parse_headers(src: &mut BytesMut) -> usize {
let mut headers: [HeaderIndex; MAX_HEADERS] = EMPTY_HEADER_INDEX_ARRAY;
let mut parsed: [httparse::Header<'_>; MAX_HEADERS] = EMPTY_HEADER_ARRAY;
let mut req = httparse::Request::new(&mut parsed);
match req.parse(src).unwrap() {
httparse::Status::Complete(_len) => {
HeaderIndex::record(src, req.headers, &mut headers);
req.headers.len()
}
_ => unreachable!(),
}
}
}
mod _original {
use super::*;
use std::mem::MaybeUninit;
pub fn parse_headers(src: &mut BytesMut) -> usize {
#![allow(invalid_value, clippy::uninit_assumed_init)]
let mut headers: [HeaderIndex; MAX_HEADERS] =
unsafe { MaybeUninit::uninit().assume_init() };
#[allow(invalid_value)]
let mut parsed: [httparse::Header<'_>; MAX_HEADERS] =
unsafe { MaybeUninit::uninit().assume_init() };
let mut req = httparse::Request::new(&mut parsed);
match req.parse(src).unwrap() {
httparse::Status::Complete(_len) => {
HeaderIndex::record(src, req.headers, &mut headers);
req.headers.len()
}
_ => unreachable!(),
}
}
}

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@ -1,93 +0,0 @@
use criterion::{black_box, criterion_group, criterion_main, BenchmarkId, Criterion};
fn bench_write_camel_case(c: &mut Criterion) {
let mut group = c.benchmark_group("write_camel_case");
let names = ["connection", "Transfer-Encoding", "transfer-encoding"];
for &i in &names {
let bts = i.as_bytes();
group.bench_with_input(BenchmarkId::new("Original", i), bts, |b, bts| {
b.iter(|| {
let mut buf = black_box([0; 24]);
_original::write_camel_case(black_box(bts), &mut buf)
});
});
group.bench_with_input(BenchmarkId::new("New", i), bts, |b, bts| {
b.iter(|| {
let mut buf = black_box([0; 24]);
let len = black_box(bts.len());
_new::write_camel_case(black_box(bts), buf.as_mut_ptr(), len)
});
});
}
group.finish();
}
criterion_group!(benches, bench_write_camel_case);
criterion_main!(benches);
mod _new {
pub fn write_camel_case(value: &[u8], buf: *mut u8, len: usize) {
// first copy entire (potentially wrong) slice to output
let buffer = unsafe {
std::ptr::copy_nonoverlapping(value.as_ptr(), buf, len);
std::slice::from_raw_parts_mut(buf, len)
};
let mut iter = value.iter();
// first character should be uppercase
if let Some(c @ b'a'..=b'z') = iter.next() {
buffer[0] = c & 0b1101_1111;
}
// track 1 ahead of the current position since that's the location being assigned to
let mut index = 2;
// remaining characters after hyphens should also be uppercase
while let Some(&c) = iter.next() {
if c == b'-' {
// advance iter by one and uppercase if needed
if let Some(c @ b'a'..=b'z') = iter.next() {
buffer[index] = c & 0b1101_1111;
}
}
index += 1;
}
}
}
mod _original {
pub fn write_camel_case(value: &[u8], buffer: &mut [u8]) {
let mut index = 0;
let key = value;
let mut key_iter = key.iter();
if let Some(c) = key_iter.next() {
if *c >= b'a' && *c <= b'z' {
buffer[index] = *c ^ b' ';
index += 1;
}
} else {
return;
}
while let Some(c) = key_iter.next() {
buffer[index] = *c;
index += 1;
if *c == b'-' {
if let Some(c) = key_iter.next() {
if *c >= b'a' && *c <= b'z' {
buffer[index] = *c ^ b' ';
index += 1;
}
}
}
}
}
}