diff options
Diffstat (limited to 'vendor/lebe/benches')
| -rw-r--r-- | vendor/lebe/benches/benches.rs | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/vendor/lebe/benches/benches.rs b/vendor/lebe/benches/benches.rs new file mode 100644 index 0000000..eca67f5 --- /dev/null +++ b/vendor/lebe/benches/benches.rs @@ -0,0 +1,137 @@ +#[macro_use] +extern crate bencher; + +use bencher::Bencher; +use lebe::prelude::*; +use byteorder::{ReadBytesExt, LittleEndian, BigEndian, WriteBytesExt}; +use std::io::{Read, Write, Cursor}; + +const COUNT_8: usize = 2048; +const COUNT_16: usize = COUNT_8 / 2; +const COUNT_32: usize = COUNT_8 / 4; +const COUNT_64: usize = COUNT_8 / 8; + + +fn bytes(count: usize) -> Cursor<Vec<u8>> { + let vec: Vec<u8> = (0..count).map(|i| (i % 256) as u8).collect(); + Cursor::new(vec) +} + +fn floats(count: usize) -> Vec<f32> { + (0..count).map(|i| i as f32).collect() +} + +fn read_slice_f32_le_crate(bench: &mut Bencher) { + bench.iter(move ||{ + let mut target = vec![ 0_f32; COUNT_32 ]; + bencher::black_box(bytes(COUNT_8).read_from_little_endian_into(target.as_mut_slice())).unwrap(); + bencher::black_box(target); + }) +} + +fn read_slice_f32_le_byteorder(bench: &mut Bencher) { + bench.iter(move ||{ + let mut target = vec![ 0_f32; COUNT_32 ]; + bencher::black_box(bytes(COUNT_8).read_f32_into::<LittleEndian>(target.as_mut_slice())).unwrap(); + bencher::black_box(target); + }) +} + +fn read_slice_f32_be_crate(bench: &mut Bencher) { + bench.iter(move ||{ + let mut target = vec![ 0_f32; COUNT_32 ]; + bencher::black_box(bytes(COUNT_8).read_from_big_endian_into(target.as_mut_slice())).unwrap(); + bencher::black_box(target); + }) +} + +fn read_slice_f32_be_byteorder(bench: &mut Bencher) { + bench.iter(move ||{ + let mut target = vec![ 0_f32; COUNT_32 ]; + bencher::black_box(bytes(COUNT_8).read_f32_into::<BigEndian>(target.as_mut_slice())).unwrap(); + bencher::black_box(target); + }) +} + +// FIXME faster than baseline?!?!! +fn write_slice_f32_le_crate(bench: &mut Bencher) { + bench.iter(move ||{ + let data = floats(COUNT_32); + let mut output = Vec::with_capacity(COUNT_8); + + bencher::black_box(output.write_as_little_endian(data.as_slice())).unwrap(); + assert_eq!(output.len(), COUNT_8); + bencher::black_box(output); + }) +} + +fn write_slice_f32_le_byteorder(bench: &mut Bencher) { + bench.iter(move ||{ + let data = floats(COUNT_32); + let mut output = Vec::with_capacity(COUNT_8); + + for number in data { + bencher::black_box(output.write_f32::<LittleEndian>(number)).unwrap(); + } + + assert_eq!(output.len(), COUNT_8); + bencher::black_box(output); + }) +} + + +fn write_slice_f32_be_crate(bench: &mut Bencher) { + bench.iter(move ||{ + let data = floats(COUNT_32); + let mut output = Vec::with_capacity(COUNT_8); + + bencher::black_box(output.write_as_big_endian(data.as_slice())).unwrap(); + assert_eq!(output.len(), COUNT_8); + bencher::black_box(output); + }) +} + +fn write_slice_f32_be_byteorder(bench: &mut Bencher) { + bench.iter(move ||{ + let data = floats(COUNT_32); + let mut output = Vec::with_capacity(COUNT_8); + + for number in data { + bencher::black_box(output.write_f32::<BigEndian>(number)).unwrap(); + } + + assert_eq!(output.len(), COUNT_8); + bencher::black_box(output); + }) +} + + + +fn read_slice_baseline(bench: &mut Bencher) { + bench.iter(move ||{ + let mut target = vec![ 0_u8; COUNT_8 ]; + bencher::black_box(bytes(COUNT_8).read_exact(target.as_mut_slice())).unwrap(); + bencher::black_box(target); + }) +} + + +fn write_slice_baseline(bench: &mut Bencher) { + bench.iter(move ||{ + let data = bytes(COUNT_8).into_inner(); + let mut output = Vec::with_capacity(COUNT_8); + + bencher::black_box(output.write_all(data.as_slice())).unwrap(); + bencher::black_box(output); + }) +} + +benchmark_group!( + benches, + read_slice_f32_be_byteorder, read_slice_f32_be_crate, read_slice_f32_le_byteorder, + read_slice_f32_le_crate, write_slice_f32_le_byteorder, write_slice_f32_le_crate, + write_slice_f32_be_byteorder, write_slice_f32_be_crate, + read_slice_baseline, write_slice_baseline +); + +benchmark_main!(benches);
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