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Attempt to benchmark gcd algorithm
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This commit is contained in:
Timothy Warren 2020-02-21 16:33:00 -05:00
parent d4458bae08
commit bf09388604
2 changed files with 48 additions and 9 deletions
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42
benches/stock_functions.rs
View File

@ -1,4 +1,5 @@
use criterion::{black_box, criterion_group, criterion_main, BenchmarkId, Criterion};
use rusty_numbers::num::Unsigned;
use rusty_numbers::{factorial, fibonacci, it_factorial, mem_fibonacci, rec_fibonacci};
fn bench_factorial(c: &mut Criterion) {
@ -6,10 +7,10 @@ fn bench_factorial(c: &mut Criterion) {
for i in [0usize, 5, 10, 15, 20, 25, 30, 34].iter() {
group.bench_with_input(BenchmarkId::new("Recursive naive", i), i, |b, i| {
b.iter(|| factorial(*i))
b.iter(|| factorial(black_box(*i)))
});
group.bench_with_input(BenchmarkId::new("Iterative", i), i, |b, i| {
b.iter(|| it_factorial(*i))
b.iter(|| it_factorial(black_box(*i)))
});
}
group.finish();
@ -18,26 +19,49 @@ fn bench_factorial(c: &mut Criterion) {
fn bench_fibonacci(c: &mut Criterion) {
let mut group = c.benchmark_group("Fibonacci");
for i in [0usize, 5, 10, 15, 20, 30].iter() {
for i in [0usize, 10, 20, 30, 40, 50, 70, 93, 140, 186].iter() {
group.bench_with_input(BenchmarkId::new("Recursive memoized", i), i, |b, i| {
b.iter(|| mem_fibonacci(*i))
b.iter(|| mem_fibonacci(black_box(*i)))
});
// group.bench_with_input(BenchmarkId::new("Recursive naive", i), i, |b, i| b.iter(|| rec_fibonacci(*i)));
group.bench_with_input(BenchmarkId::new("Iterative", i), i, |b, i| {
b.iter(|| fibonacci(*i))
b.iter(|| fibonacci(black_box(*i)))
});
}
group.finish();
let mut group = c.benchmark_group("Recursive Fibonacci");
for i in [0usize, 5, 10, 15, 20, 25, 26, 27, 28, 29, 30].iter() {
for i in [0usize, 10, 20, 25, 26, 27, 28, 29, 30].iter() {
group.bench_with_input(BenchmarkId::new("Naive Recursive", i), i, |b, i| {
b.iter(|| rec_fibonacci(*i))
b.iter(|| rec_fibonacci(black_box(*i)))
});
}
group.finish();
}
criterion_group!(benches, bench_factorial, bench_fibonacci);
fn bench_gcd(c: &mut Criterion) {
let mut group = c.benchmark_group("GCD");
let max = fibonacci(186).unwrap();
let max_1 = fibonacci(185).unwrap();
let med = fibonacci(93).unwrap();
let med_1 = fibonacci(92).unwrap();
let small = fibonacci(15).unwrap();
let small_1 = fibonacci(14).unwrap();
for input in [(small_1, small), (med_1, med), (max_1, max)].iter() {
let param = format!("{},{}", input.0, input.1);
group.bench_with_input(BenchmarkId::new("Binary", &param), input, |b, input| {
b.iter(|| u128::gcd(black_box(input.0), black_box(input.1)))
});
group.bench_with_input(BenchmarkId::new("Euclid", &param), input, |b, input| {
b.iter(|| u128::e_gcd(black_box(input.0), black_box(input.1)))
});
}
group.finish();
}
criterion_group!(benches, bench_factorial, bench_fibonacci, bench_gcd);
criterion_main!(benches);

15
src/num.rs
View File

@ -108,6 +108,9 @@ pub trait Unsigned:
/// Find the greatest common denominator of two numbers
fn gcd(a: Self, b: Self) -> Self;
/// Euclid gcd algorithm
fn e_gcd(a: Self, b: Self) -> Self;
/// Find the least common multiple of two numbers
fn lcm(a: Self, b: Self) -> Self;
}
@ -205,6 +208,17 @@ macro_rules! impl_unsigned {
Self::gcd((b - a) >> 1, a)
}
fn e_gcd(x: $Type, y: $Type) -> $Type {
let mut x = x;
let mut y = y;
while y != 0 {
let t = y;
y = x % y;
x = t;
}
x
}
fn lcm(a: $Type, b: $Type) -> $Type {
if (a == 0 && b == 0) {
return 0;
@ -254,6 +268,7 @@ mod tests {
assert_eq!(u8::gcd(2, 2), 2);
assert_eq!(u8::gcd(2, 8), 2);
assert_eq!(u16::gcd(36, 48), 12);
assert_eq!(u16::e_gcd(36, 48), 12);
}
#[test]