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|
// $ cargo bench --features full --bench rust
//
// Syn only, useful for profiling:
// $ RUSTFLAGS='--cfg syn_only' cargo build --release --features full --bench rust
#![cfg_attr(not(syn_only), feature(rustc_private))]
#![recursion_limit = "1024"]
#[macro_use]
#[path = "../tests/macros/mod.rs"]
mod macros;
#[path = "../tests/common/mod.rs"]
mod common;
#[path = "../tests/repo/mod.rs"]
mod repo;
use std::fs;
use std::time::{Duration, Instant};
#[cfg(not(syn_only))]
mod tokenstream_parse {
use proc_macro2::TokenStream;
use std::str::FromStr;
pub fn bench(content: &str) -> Result<(), ()> {
TokenStream::from_str(content).map(drop).map_err(drop)
}
}
mod syn_parse {
pub fn bench(content: &str) -> Result<(), ()> {
syn::parse_file(content).map(drop).map_err(drop)
}
}
#[cfg(not(syn_only))]
mod libsyntax_parse {
extern crate rustc_data_structures;
extern crate rustc_parse;
extern crate rustc_span;
extern crate syntax;
use rustc_data_structures::sync::Lrc;
use rustc_span::FileName;
use syntax::edition::Edition;
use syntax::errors::{emitter::Emitter, Diagnostic, Handler};
use syntax::sess::ParseSess;
use syntax::source_map::{FilePathMapping, SourceMap};
pub fn bench(content: &str) -> Result<(), ()> {
struct SilentEmitter;
impl Emitter for SilentEmitter {
fn emit_diagnostic(&mut self, _diag: &Diagnostic) {}
fn source_map(&self) -> Option<&Lrc<SourceMap>> {
None
}
}
syntax::with_globals(Edition::Edition2018, || {
let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
let emitter = Box::new(SilentEmitter);
let handler = Handler::with_emitter(false, None, emitter);
let sess = ParseSess::with_span_handler(handler, cm);
if let Err(mut diagnostic) = rustc_parse::parse_crate_from_source_str(
FileName::Custom("bench".to_owned()),
content.to_owned(),
&sess,
) {
diagnostic.cancel();
return Err(());
};
Ok(())
})
}
}
#[cfg(not(syn_only))]
mod read_from_disk {
pub fn bench(content: &str) -> Result<(), ()> {
let _ = content;
Ok(())
}
}
fn exec(mut codepath: impl FnMut(&str) -> Result<(), ()>) -> Duration {
let begin = Instant::now();
let mut success = 0;
let mut total = 0;
walkdir::WalkDir::new("tests/rust/src")
.into_iter()
.filter_entry(repo::base_dir_filter)
.for_each(|entry| {
let entry = entry.unwrap();
let path = entry.path();
if path.is_dir() {
return;
}
let content = fs::read_to_string(path).unwrap();
let ok = codepath(&content).is_ok();
success += ok as usize;
total += 1;
if !ok {
eprintln!("FAIL {}", path.display());
}
});
assert_eq!(success, total);
begin.elapsed()
}
fn main() {
repo::clone_rust();
macro_rules! testcases {
($($(#[$cfg:meta])* $name:path,)*) => {
vec![
$(
$(#[$cfg])*
(stringify!($name), $name as fn(&str) -> Result<(), ()>),
)*
]
};
}
#[cfg(not(syn_only))]
{
let mut lines = 0;
let mut files = 0;
exec(|content| {
lines += content.lines().count();
files += 1;
Ok(())
});
eprintln!("\n{} lines in {} files", lines, files);
}
for (name, f) in testcases!(
#[cfg(not(syn_only))]
read_from_disk::bench,
#[cfg(not(syn_only))]
tokenstream_parse::bench,
syn_parse::bench,
#[cfg(not(syn_only))]
libsyntax_parse::bench,
) {
eprint!("{:20}", format!("{}:", name));
let elapsed = exec(f);
eprintln!(
"elapsed={}.{:03}s",
elapsed.as_secs(),
elapsed.subsec_millis(),
);
}
eprintln!();
}
|
