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macros.rs
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/*! Macro construction benchmarks.
This is taken from [issue #28], which noted that the `bitvec![bit; rep]`
expansion was horribly inefficient.
This benchmark crate should be used for all macro performance recording, and
compare the macros against `vec!`. While `vec!` will always be faster, because
`bitvec!` does more work than `vec!`, they should at least be close.
Original performance was 10,000x slower. Performance after the fix for #28 was
within 20ns.
[issue #28]: https://github.com/ferrilab/bitvec/issues/28
!*/
#![feature(test)]
extern crate test;
use bitvec::prelude::*;
use test::Bencher;
#[bench]
fn bits_seq_u8(b: &mut Bencher) {
b.iter(|| {
bitarr![u8, LocalBits;
0, 1, 0, 1, 0, 0, 1, 1,
0, 1, 1, 0, 0, 0, 0, 1,
0, 1, 1, 0, 1, 1, 0, 0,
0, 1, 1, 1, 0, 1, 0, 1,
0, 1, 1, 1, 0, 1, 0, 0,
0, 1, 1, 0, 1, 1, 1, 1,
0, 1, 1, 0, 1, 1, 1, 0,
0, 0, 1, 0, 1, 1, 0, 0,
0, 0, 1, 0, 0, 0, 0, 0,
0, 1, 1, 0, 1, 1, 0, 1,
0, 1, 1, 0, 1, 1, 1, 1,
0, 1, 1, 0, 1, 1, 1, 0,
0, 1, 1, 0, 0, 1, 0, 0,
0, 1, 1, 0, 1, 1, 1, 1,
0, 0, 1, 0, 0, 0, 0, 1,
]
});
}
#[bench]
fn bits_seq_u16(b: &mut Bencher) {
b.iter(|| {
bitarr![u16, LocalBits;
0, 1, 0, 1, 0, 0, 1, 1,
0, 1, 1, 0, 0, 0, 0, 1,
0, 1, 1, 0, 1, 1, 0, 0,
0, 1, 1, 1, 0, 1, 0, 1,
0, 1, 1, 1, 0, 1, 0, 0,
0, 1, 1, 0, 1, 1, 1, 1,
0, 1, 1, 0, 1, 1, 1, 0,
0, 0, 1, 0, 1, 1, 0, 0,
0, 0, 1, 0, 0, 0, 0, 0,
0, 1, 1, 0, 1, 1, 0, 1,
0, 1, 1, 0, 1, 1, 1, 1,
0, 1, 1, 0, 1, 1, 1, 0,
0, 1, 1, 0, 0, 1, 0, 0,
0, 1, 1, 0, 1, 1, 1, 1,
0, 0, 1, 0, 0, 0, 0, 1,
]
});
}
#[bench]
fn bits_seq_u32(b: &mut Bencher) {
b.iter(|| {
bitarr![u32, LocalBits;
0, 1, 0, 1, 0, 0, 1, 1,
0, 1, 1, 0, 0, 0, 0, 1,
0, 1, 1, 0, 1, 1, 0, 0,
0, 1, 1, 1, 0, 1, 0, 1,
0, 1, 1, 1, 0, 1, 0, 0,
0, 1, 1, 0, 1, 1, 1, 1,
0, 1, 1, 0, 1, 1, 1, 0,
0, 0, 1, 0, 1, 1, 0, 0,
0, 0, 1, 0, 0, 0, 0, 0,
0, 1, 1, 0, 1, 1, 0, 1,
0, 1, 1, 0, 1, 1, 1, 1,
0, 1, 1, 0, 1, 1, 1, 0,
0, 1, 1, 0, 0, 1, 0, 0,
0, 1, 1, 0, 1, 1, 1, 1,
0, 0, 1, 0, 0, 0, 0, 1,
]
});
}
#[bench]
#[cfg(target_pointer_width = "64")]
fn bits_seq_u64(b: &mut Bencher) {
b.iter(|| {
bitarr![u64, LocalBits;
0, 1, 0, 1, 0, 0, 1, 1,
0, 1, 1, 0, 0, 0, 0, 1,
0, 1, 1, 0, 1, 1, 0, 0,
0, 1, 1, 1, 0, 1, 0, 1,
0, 1, 1, 1, 0, 1, 0, 0,
0, 1, 1, 0, 1, 1, 1, 1,
0, 1, 1, 0, 1, 1, 1, 0,
0, 0, 1, 0, 1, 1, 0, 0,
0, 0, 1, 0, 0, 0, 0, 0,
0, 1, 1, 0, 1, 1, 0, 1,
0, 1, 1, 0, 1, 1, 1, 1,
0, 1, 1, 0, 1, 1, 1, 0,
0, 1, 1, 0, 0, 1, 0, 0,
0, 1, 1, 0, 1, 1, 1, 1,
0, 0, 1, 0, 0, 0, 0, 1,
]
});
}
// The repetition macros run at compile time, so should bench at zero.
#[bench]
fn bits_rep_u8(b: &mut Bencher) {
b.iter(|| bitarr![u8, LocalBits; 0; 120]);
b.iter(|| bitarr![u8, LocalBits; 1; 120]);
}
#[bench]
fn bits_rep_u16(b: &mut Bencher) {
b.iter(|| bitarr![u16, LocalBits; 0; 120]);
b.iter(|| bitarr![u16, LocalBits; 1; 120]);
}
#[bench]
fn bits_rep_u32(b: &mut Bencher) {
b.iter(|| bitarr![u32, LocalBits; 0; 120]);
b.iter(|| bitarr![u32, LocalBits; 1; 120]);
}
#[bench]
#[cfg(target_pointer_width = "64")]
fn bits_rep_u64(b: &mut Bencher) {
b.iter(|| bitarr![u64, LocalBits; 0; 120]);
b.iter(|| bitarr![u64, LocalBits; 1; 120]);
}
#[bench]
fn bitvec_rep(b: &mut Bencher) {
b.iter(|| bitvec![0; 16 * 16 * 9]);
b.iter(|| bitvec![1; 16 * 16 * 9]);
}
#[bench]
fn vec_rep(b: &mut Bencher) {
b.iter(|| vec![0u8; 16 * 16 * 9 / 8]);
b.iter(|| vec![-1i8; 16 * 16 * 9 / 8]);
}