1 #![feature(test)]
2 
3 extern crate mime;
4 extern crate test;
5 
6 use test::Bencher;
7 
8 #[bench]
bench_fmt(b: &mut Bencher)9 fn bench_fmt(b: &mut Bencher) {
10     use std::fmt::Write;
11     let mime = ::mime::TEXT_PLAIN_UTF_8;
12     b.bytes = mime.to_string().as_bytes().len() as u64;
13     let mut s = String::with_capacity(64);
14     b.iter(|| {
15         let _ = write!(s, "{}", mime);
16         ::test::black_box(&s);
17         unsafe { s.as_mut_vec().set_len(0); }
18     })
19 }
20