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// $ cargo bench --features full,test --bench rust
//
// Syn only, useful for profiling:
// $ RUSTFLAGS='--cfg syn_only' cargo build --release --features full,test --bench rust
#![cfg_attr(not(syn_only), feature(rustc_private))]
#![recursion_limit = "1024"]
#![allow(
clippy::arc_with_non_send_sync,
clippy::cast_lossless,
clippy::let_underscore_untyped,
clippy::manual_let_else,
clippy::match_like_matches_macro,
clippy::uninlined_format_args,
clippy::unnecessary_wraps
)]
#[macro_use]
#[path = "../tests/macros/mod.rs"]
mod macros;
#[allow(dead_code)]
#[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 librustc_parse {
extern crate rustc_data_structures;
extern crate rustc_driver;
extern crate rustc_error_messages;
extern crate rustc_errors;
extern crate rustc_parse;
extern crate rustc_session;
extern crate rustc_span;
use rustc_data_structures::sync::Lrc;
use rustc_error_messages::FluentBundle;
use rustc_errors::{emitter::Emitter, translation::Translate, DiagCtxt, Diagnostic};
use rustc_session::parse::ParseSess;
use rustc_span::source_map::{FilePathMapping, SourceMap};
use rustc_span::{edition::Edition, FileName};
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
}
}
impl Translate for SilentEmitter {
fn fluent_bundle(&self) -> Option<&Lrc<FluentBundle>> {
None
}
fn fallback_fluent_bundle(&self) -> &FluentBundle {
panic!("silent emitter attempted to translate a diagnostic");
}
}
rustc_span::create_session_if_not_set_then(Edition::Edition2018, |_| {
let source_map = Lrc::new(SourceMap::new(FilePathMapping::empty()));
let emitter = Box::new(SilentEmitter);
let handler = DiagCtxt::with_emitter(emitter);
let sess = ParseSess::with_dcx(handler, source_map);
if let Err(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;
["tests/rust/compiler", "tests/rust/library"]
.iter()
.flat_map(|dir| {
walkdir::WalkDir::new(dir)
.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:ident,)*) => {
[
$(
$(#[$cfg])*
(stringify!($name), $name::bench 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,
#[cfg(not(syn_only))]
tokenstream_parse,
syn_parse,
#[cfg(not(syn_only))]
librustc_parse,
) {
eprint!("{:20}", format!("{}:", name));
let elapsed = exec(f);
eprintln!(
"elapsed={}.{:03}s",
elapsed.as_secs(),
elapsed.subsec_millis(),
);
}
eprintln!();
}