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-rw-r--r--vendor/syn/benches/file.rs34
1 files changed, 29 insertions, 5 deletions
diff --git a/vendor/syn/benches/file.rs b/vendor/syn/benches/file.rs
index 86204df2d..c500dc24a 100644
--- a/vendor/syn/benches/file.rs
+++ b/vendor/syn/benches/file.rs
@@ -2,7 +2,11 @@
#![feature(rustc_private, test)]
#![recursion_limit = "1024"]
-#![allow(clippy::missing_panics_doc, clippy::must_use_candidate)]
+#![allow(
+ clippy::items_after_statements,
+ clippy::missing_panics_doc,
+ clippy::must_use_candidate
+)]
extern crate test;
@@ -15,17 +19,37 @@ mod common;
#[path = "../tests/repo/mod.rs"]
pub mod repo;
-use proc_macro2::TokenStream;
+use proc_macro2::{Span, TokenStream};
use std::fs;
use std::str::FromStr;
+use syn::parse::{ParseStream, Parser};
use test::Bencher;
const FILE: &str = "tests/rust/library/core/src/str/mod.rs";
-#[bench]
-fn parse_file(b: &mut Bencher) {
+fn get_tokens() -> TokenStream {
repo::clone_rust();
let content = fs::read_to_string(FILE).unwrap();
- let tokens = TokenStream::from_str(&content).unwrap();
+ TokenStream::from_str(&content).unwrap()
+}
+
+#[bench]
+fn baseline(b: &mut Bencher) {
+ let tokens = get_tokens();
+ b.iter(|| drop(tokens.clone()));
+}
+
+#[bench]
+fn create_token_buffer(b: &mut Bencher) {
+ let tokens = get_tokens();
+ fn immediate_fail(_input: ParseStream) -> syn::Result<()> {
+ Err(syn::Error::new(Span::call_site(), ""))
+ }
+ b.iter(|| immediate_fail.parse2(tokens.clone()));
+}
+
+#[bench]
+fn parse_file(b: &mut Bencher) {
+ let tokens = get_tokens();
b.iter(|| syn::parse2::<syn::File>(tokens.clone()));
}