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|
use criterion::{black_box, Criterion};
use anstyle_parse::*;
struct BenchDispatcher;
impl Perform for BenchDispatcher {
fn print(&mut self, c: char) {
black_box(c);
}
fn execute(&mut self, byte: u8) {
black_box(byte);
}
fn hook(&mut self, params: &Params, intermediates: &[u8], ignore: bool, c: u8) {
black_box((params, intermediates, ignore, c));
}
fn put(&mut self, byte: u8) {
black_box(byte);
}
fn osc_dispatch(&mut self, params: &[&[u8]], bell_terminated: bool) {
black_box((params, bell_terminated));
}
fn csi_dispatch(&mut self, params: &Params, intermediates: &[u8], ignore: bool, c: u8) {
black_box((params, intermediates, ignore, c));
}
fn esc_dispatch(&mut self, intermediates: &[u8], ignore: bool, byte: u8) {
black_box((intermediates, ignore, byte));
}
}
#[derive(Default)]
struct Strip(String);
impl Strip {
fn with_capacity(capacity: usize) -> Self {
Self(String::with_capacity(capacity))
}
}
impl Perform for Strip {
fn print(&mut self, c: char) {
self.0.push(c);
}
fn execute(&mut self, byte: u8) {
if byte.is_ascii_whitespace() {
self.0.push(byte as char);
}
}
}
fn strip_str(content: &str) -> String {
use anstyle_parse::state::state_change;
use anstyle_parse::state::Action;
use anstyle_parse::state::State;
#[inline]
fn is_utf8_continuation(b: u8) -> bool {
matches!(b, 0x80..=0xbf)
}
#[inline]
fn is_printable(action: Action, byte: u8) -> bool {
action == Action::Print
|| action == Action::BeginUtf8
// since we know the input is valid UTF-8, the only thing we can do with
// continuations is to print them
|| is_utf8_continuation(byte)
|| (action == Action::Execute && byte.is_ascii_whitespace())
}
let mut stripped = Vec::with_capacity(content.len());
let mut bytes = content.as_bytes();
while !bytes.is_empty() {
let offset = bytes.iter().copied().position(|b| {
let (_next_state, action) = state_change(State::Ground, b);
!is_printable(action, b)
});
let (printable, next) = bytes.split_at(offset.unwrap_or(bytes.len()));
stripped.extend(printable);
bytes = next;
let mut state = State::Ground;
let offset = bytes.iter().copied().position(|b| {
let (next_state, action) = state_change(state, b);
if next_state != State::Anywhere {
state = next_state;
}
is_printable(action, b)
});
let (_, next) = bytes.split_at(offset.unwrap_or(bytes.len()));
bytes = next;
}
String::from_utf8(stripped).unwrap()
}
fn parse(c: &mut Criterion) {
for (name, content) in [
#[cfg(feature = "utf8")]
("demo.vte", &include_bytes!("../tests/demo.vte")[..]),
("rg_help.vte", &include_bytes!("../tests/rg_help.vte")[..]),
("rg_linus.vte", &include_bytes!("../tests/rg_linus.vte")[..]),
(
"state_changes",
&b"\x1b]2;X\x1b\\ \x1b[0m \x1bP0@\x1b\\"[..],
),
] {
// Make sure the comparison is fair
if let Ok(content) = std::str::from_utf8(content) {
let mut stripped = Strip::with_capacity(content.len());
let mut parser = Parser::<DefaultCharAccumulator>::new();
for byte in content.as_bytes() {
parser.advance(&mut stripped, *byte);
}
assert_eq!(stripped.0, strip_str(content));
}
let mut group = c.benchmark_group(name);
group.bench_function("advance", |b| {
b.iter(|| {
let mut dispatcher = BenchDispatcher;
let mut parser = Parser::<DefaultCharAccumulator>::new();
for byte in content {
parser.advance(&mut dispatcher, *byte);
}
})
});
group.bench_function("advance_strip", |b| {
b.iter(|| {
let mut stripped = Strip::with_capacity(content.len());
let mut parser = Parser::<DefaultCharAccumulator>::new();
for byte in content {
parser.advance(&mut stripped, *byte);
}
black_box(stripped.0)
})
});
group.bench_function("state_change", |b| {
b.iter(|| {
let mut state = anstyle_parse::state::State::default();
for byte in content {
let (next_state, action) = anstyle_parse::state::state_change(state, *byte);
state = next_state;
black_box(action);
}
})
});
if let Ok(content) = std::str::from_utf8(content) {
group.bench_function("state_change_strip_str", |b| {
b.iter(|| {
let stripped = strip_str(content);
black_box(stripped)
})
});
}
}
}
criterion::criterion_group!(benches, parse);
criterion::criterion_main!(benches);
|
