use test::{black_box, Bencher}; #[bench] fn starts_with_char(b: &mut Bencher) { let text = black_box("kdjsfhlakfhlsghlkvcnljknfqiunvcijqenwodind"); b.iter(|| { for _ in 0..1024 { black_box(text.starts_with('k')); } }) } #[bench] fn starts_with_str(b: &mut Bencher) { let text = black_box("kdjsfhlakfhlsghlkvcnljknfqiunvcijqenwodind"); b.iter(|| { for _ in 0..1024 { black_box(text.starts_with("k")); } }) } #[bench] fn ends_with_char(b: &mut Bencher) { let text = black_box("kdjsfhlakfhlsghlkvcnljknfqiunvcijqenwodind"); b.iter(|| { for _ in 0..1024 { black_box(text.ends_with('k')); } }) } #[bench] fn ends_with_str(b: &mut Bencher) { let text = black_box("kdjsfhlakfhlsghlkvcnljknfqiunvcijqenwodind"); b.iter(|| { for _ in 0..1024 { black_box(text.ends_with("k")); } }) }