| use test::Bencher; |
| |
| const CHARS: [char; 9] = ['0', 'x', '2', '5', 'A', 'f', '7', '8', '9']; |
| const RADIX: [u32; 5] = [2, 8, 10, 16, 32]; |
| |
| #[bench] |
| fn bench_to_digit_radix_2(b: &mut Bencher) { |
| b.iter(|| CHARS.iter().cycle().take(10_000).map(|c| c.to_digit(2)).min()) |
| } |
| |
| #[bench] |
| fn bench_to_digit_radix_10(b: &mut Bencher) { |
| b.iter(|| CHARS.iter().cycle().take(10_000).map(|c| c.to_digit(10)).min()) |
| } |
| |
| #[bench] |
| fn bench_to_digit_radix_16(b: &mut Bencher) { |
| b.iter(|| CHARS.iter().cycle().take(10_000).map(|c| c.to_digit(16)).min()) |
| } |
| |
| #[bench] |
| fn bench_to_digit_radix_36(b: &mut Bencher) { |
| b.iter(|| CHARS.iter().cycle().take(10_000).map(|c| c.to_digit(36)).min()) |
| } |
| |
| #[bench] |
| fn bench_to_digit_radix_var(b: &mut Bencher) { |
| b.iter(|| { |
| CHARS |
| .iter() |
| .cycle() |
| .zip(RADIX.iter().cycle()) |
| .take(10_000) |
| .map(|(c, radix)| c.to_digit(*radix)) |
| .min() |
| }) |
| } |
| |
| #[bench] |
| fn bench_to_ascii_uppercase(b: &mut Bencher) { |
| b.iter(|| CHARS.iter().cycle().take(10_000).map(|c| c.to_ascii_uppercase()).min()) |
| } |
| |
| #[bench] |
| fn bench_to_ascii_lowercase(b: &mut Bencher) { |
| b.iter(|| CHARS.iter().cycle().take(10_000).map(|c| c.to_ascii_lowercase()).min()) |
| } |
| |
| #[bench] |
| fn bench_ascii_mix_to_uppercase(b: &mut Bencher) { |
| b.iter(|| (0..=255).cycle().take(10_000).map(|b| char::from(b).to_uppercase()).count()) |
| } |
| |
| #[bench] |
| fn bench_ascii_mix_to_lowercase(b: &mut Bencher) { |
| b.iter(|| (0..=255).cycle().take(10_000).map(|b| char::from(b).to_lowercase()).count()) |
| } |
| |
| #[bench] |
| fn bench_ascii_char_to_uppercase(b: &mut Bencher) { |
| b.iter(|| (0..=127).cycle().take(10_000).map(|b| char::from(b).to_uppercase()).count()) |
| } |
| |
| #[bench] |
| fn bench_ascii_char_to_lowercase(b: &mut Bencher) { |
| b.iter(|| (0..=127).cycle().take(10_000).map(|b| char::from(b).to_lowercase()).count()) |
| } |
| |
| #[bench] |
| fn bench_non_ascii_char_to_uppercase(b: &mut Bencher) { |
| b.iter(|| (128..=255).cycle().take(10_000).map(|b| char::from(b).to_uppercase()).count()) |
| } |
| |
| #[bench] |
| fn bench_non_ascii_char_to_lowercase(b: &mut Bencher) { |
| b.iter(|| (128..=255).cycle().take(10_000).map(|b| char::from(b).to_lowercase()).count()) |
| } |