diff options
Diffstat (limited to 'third_party/rust/bytes/benches/bytes_mut.rs')
| -rw-r--r-- | third_party/rust/bytes/benches/bytes_mut.rs | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/third_party/rust/bytes/benches/bytes_mut.rs b/third_party/rust/bytes/benches/bytes_mut.rs new file mode 100644 index 0000000000..b069436210 --- /dev/null +++ b/third_party/rust/bytes/benches/bytes_mut.rs @@ -0,0 +1,266 @@ +#![feature(test)] +#![warn(rust_2018_idioms)] + +extern crate test; + +use bytes::{BufMut, BytesMut}; +use test::Bencher; + +#[bench] +fn alloc_small(b: &mut Bencher) { + b.iter(|| { + for _ in 0..1024 { + test::black_box(BytesMut::with_capacity(12)); + } + }) +} + +#[bench] +fn alloc_mid(b: &mut Bencher) { + b.iter(|| { + test::black_box(BytesMut::with_capacity(128)); + }) +} + +#[bench] +fn alloc_big(b: &mut Bencher) { + b.iter(|| { + test::black_box(BytesMut::with_capacity(4096)); + }) +} + +#[bench] +fn deref_unique(b: &mut Bencher) { + let mut buf = BytesMut::with_capacity(4096); + buf.put(&[0u8; 1024][..]); + + b.iter(|| { + for _ in 0..1024 { + test::black_box(&buf[..]); + } + }) +} + +#[bench] +fn deref_unique_unroll(b: &mut Bencher) { + let mut buf = BytesMut::with_capacity(4096); + buf.put(&[0u8; 1024][..]); + + b.iter(|| { + for _ in 0..128 { + test::black_box(&buf[..]); + test::black_box(&buf[..]); + test::black_box(&buf[..]); + test::black_box(&buf[..]); + test::black_box(&buf[..]); + test::black_box(&buf[..]); + test::black_box(&buf[..]); + test::black_box(&buf[..]); + } + }) +} + +#[bench] +fn deref_shared(b: &mut Bencher) { + let mut buf = BytesMut::with_capacity(4096); + buf.put(&[0u8; 1024][..]); + let _b2 = buf.split_off(1024); + + b.iter(|| { + for _ in 0..1024 { + test::black_box(&buf[..]); + } + }) +} + +#[bench] +fn deref_two(b: &mut Bencher) { + let mut buf1 = BytesMut::with_capacity(8); + buf1.put(&[0u8; 8][..]); + + let mut buf2 = BytesMut::with_capacity(4096); + buf2.put(&[0u8; 1024][..]); + + b.iter(|| { + for _ in 0..512 { + test::black_box(&buf1[..]); + test::black_box(&buf2[..]); + } + }) +} + +#[bench] +fn clone_frozen(b: &mut Bencher) { + let bytes = BytesMut::from(&b"hello world 1234567890 and have a good byte 0987654321"[..]) + .split() + .freeze(); + + b.iter(|| { + for _ in 0..1024 { + test::black_box(&bytes.clone()); + } + }) +} + +#[bench] +fn alloc_write_split_to_mid(b: &mut Bencher) { + b.iter(|| { + let mut buf = BytesMut::with_capacity(128); + buf.put_slice(&[0u8; 64]); + test::black_box(buf.split_to(64)); + }) +} + +#[bench] +fn drain_write_drain(b: &mut Bencher) { + let data = [0u8; 128]; + + b.iter(|| { + let mut buf = BytesMut::with_capacity(1024); + let mut parts = Vec::with_capacity(8); + + for _ in 0..8 { + buf.put(&data[..]); + parts.push(buf.split_to(128)); + } + + test::black_box(parts); + }) +} + +#[bench] +fn fmt_write(b: &mut Bencher) { + use std::fmt::Write; + let mut buf = BytesMut::with_capacity(128); + let s = "foo bar baz quux lorem ipsum dolor et"; + + b.bytes = s.len() as u64; + b.iter(|| { + let _ = write!(buf, "{}", s); + test::black_box(&buf); + unsafe { + buf.set_len(0); + } + }) +} + +#[bench] +fn bytes_mut_extend(b: &mut Bencher) { + let mut buf = BytesMut::with_capacity(256); + let data = [33u8; 32]; + + b.bytes = data.len() as u64 * 4; + b.iter(|| { + for _ in 0..4 { + buf.extend(&data); + } + test::black_box(&buf); + unsafe { + buf.set_len(0); + } + }); +} + +// BufMut for BytesMut vs Vec<u8> + +#[bench] +fn put_slice_bytes_mut(b: &mut Bencher) { + let mut buf = BytesMut::with_capacity(256); + let data = [33u8; 32]; + + b.bytes = data.len() as u64 * 4; + b.iter(|| { + for _ in 0..4 { + buf.put_slice(&data); + } + test::black_box(&buf); + unsafe { + buf.set_len(0); + } + }); +} + +#[bench] +fn put_u8_bytes_mut(b: &mut Bencher) { + let mut buf = BytesMut::with_capacity(256); + let cnt = 128; + + b.bytes = cnt as u64; + b.iter(|| { + for _ in 0..cnt { + buf.put_u8(b'x'); + } + test::black_box(&buf); + unsafe { + buf.set_len(0); + } + }); +} + +#[bench] +fn put_slice_vec(b: &mut Bencher) { + let mut buf = Vec::<u8>::with_capacity(256); + let data = [33u8; 32]; + + b.bytes = data.len() as u64 * 4; + b.iter(|| { + for _ in 0..4 { + buf.put_slice(&data); + } + test::black_box(&buf); + unsafe { + buf.set_len(0); + } + }); +} + +#[bench] +fn put_u8_vec(b: &mut Bencher) { + let mut buf = Vec::<u8>::with_capacity(256); + let cnt = 128; + + b.bytes = cnt as u64; + b.iter(|| { + for _ in 0..cnt { + buf.put_u8(b'x'); + } + test::black_box(&buf); + unsafe { + buf.set_len(0); + } + }); +} + +#[bench] +fn put_slice_vec_extend(b: &mut Bencher) { + let mut buf = Vec::<u8>::with_capacity(256); + let data = [33u8; 32]; + + b.bytes = data.len() as u64 * 4; + b.iter(|| { + for _ in 0..4 { + buf.extend_from_slice(&data); + } + test::black_box(&buf); + unsafe { + buf.set_len(0); + } + }); +} + +#[bench] +fn put_u8_vec_push(b: &mut Bencher) { + let mut buf = Vec::<u8>::with_capacity(256); + let cnt = 128; + + b.bytes = cnt as u64; + b.iter(|| { + for _ in 0..cnt { + buf.push(b'x'); + } + test::black_box(&buf); + unsafe { + buf.set_len(0); + } + }); +} |