| use std::fmt::{self, Write as FmtWrite}; |
| use std::io::{self, Write as IoWrite}; |
| use test::{black_box, Bencher}; |
| |
| #[bench] |
| fn write_vec_value(bh: &mut Bencher) { |
| bh.iter(|| { |
| let mut mem = Vec::new(); |
| for _ in 0..1000 { |
| mem.write_all(black_box("abc").as_bytes()).unwrap(); |
| } |
| }); |
| } |
| |
| #[bench] |
| fn write_vec_ref(bh: &mut Bencher) { |
| bh.iter(|| { |
| let mut mem = Vec::new(); |
| let wr = &mut mem as &mut dyn io::Write; |
| for _ in 0..1000 { |
| wr.write_all(black_box("abc").as_bytes()).unwrap(); |
| } |
| }); |
| } |
| |
| #[bench] |
| fn write_vec_macro1(bh: &mut Bencher) { |
| bh.iter(|| { |
| let mut mem = Vec::new(); |
| let wr = &mut mem as &mut dyn io::Write; |
| for _ in 0..1000 { |
| write!(wr, "{}", black_box("abc")).unwrap(); |
| } |
| }); |
| } |
| |
| #[bench] |
| fn write_vec_macro2(bh: &mut Bencher) { |
| bh.iter(|| { |
| let mut mem = Vec::new(); |
| let wr = &mut mem as &mut dyn io::Write; |
| for _ in 0..1000 { |
| write!(wr, "{}", black_box("abc")).unwrap(); |
| } |
| }); |
| } |
| |
| #[bench] |
| fn write_vec_macro_debug(bh: &mut Bencher) { |
| bh.iter(|| { |
| let mut mem = Vec::new(); |
| let wr = &mut mem as &mut dyn io::Write; |
| for _ in 0..1000 { |
| write!(wr, "{:?}", black_box("☃")).unwrap(); |
| } |
| }); |
| } |
| |
| #[bench] |
| fn write_str_value(bh: &mut Bencher) { |
| bh.iter(|| { |
| let mut mem = String::new(); |
| for _ in 0..1000 { |
| mem.write_str(black_box("abc")).unwrap(); |
| } |
| }); |
| } |
| |
| #[bench] |
| fn write_str_ref(bh: &mut Bencher) { |
| bh.iter(|| { |
| let mut mem = String::new(); |
| let wr = &mut mem as &mut dyn fmt::Write; |
| for _ in 0..1000 { |
| wr.write_str(black_box("abc")).unwrap(); |
| } |
| }); |
| } |
| |
| #[bench] |
| fn write_str_macro1(bh: &mut Bencher) { |
| bh.iter(|| { |
| let mut mem = String::new(); |
| for _ in 0..1000 { |
| write!(mem, "{}", black_box("abc")).unwrap(); |
| } |
| }); |
| } |
| |
| #[bench] |
| fn write_str_macro2(bh: &mut Bencher) { |
| bh.iter(|| { |
| let mut mem = String::new(); |
| let wr = &mut mem as &mut dyn fmt::Write; |
| for _ in 0..1000 { |
| write!(wr, "{}", black_box("abc")).unwrap(); |
| } |
| }); |
| } |
| |
| #[bench] |
| fn write_str_macro_debug(bh: &mut Bencher) { |
| bh.iter(|| { |
| let mut mem = String::new(); |
| let wr = &mut mem as &mut dyn fmt::Write; |
| for _ in 0..1000 { |
| write!(wr, "{:?}", black_box("☃")).unwrap(); |
| } |
| }); |
| } |
| |
| #[bench] |
| fn write_str_macro_debug_ascii(bh: &mut Bencher) { |
| bh.iter(|| { |
| let mut mem = String::new(); |
| let wr = &mut mem as &mut dyn fmt::Write; |
| for _ in 0..1000 { |
| write!(wr, "{:?}", black_box("Hello, World!")).unwrap(); |
| } |
| }); |
| } |
| |
| #[bench] |
| fn write_u128_max(bh: &mut Bencher) { |
| bh.iter(|| { |
| test::black_box(format!("{}", u128::MAX)); |
| }); |
| } |
| |
| #[bench] |
| fn write_u128_min(bh: &mut Bencher) { |
| bh.iter(|| { |
| let s = format!("{}", 0u128); |
| test::black_box(s); |
| }); |
| } |
| |
| #[bench] |
| fn write_u64_max(bh: &mut Bencher) { |
| bh.iter(|| { |
| test::black_box(format!("{}", u64::MAX)); |
| }); |
| } |
| |
| #[bench] |
| fn write_u64_min(bh: &mut Bencher) { |
| bh.iter(|| { |
| test::black_box(format!("{}", 0u64)); |
| }); |
| } |