Remove stock function benchmarks. Moved to another repo
This commit is contained in:
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commit
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"checksum sourcefile 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4bf77cb82ba8453b42b6ae1d692e4cdc92f9a47beaf89a847c8be83f4e328ad3"
|
||||
"checksum syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "af6f3550d8dff9ef7dc34d384ac6f107e5d31c8f57d9f28e0081503f547ac8f5"
|
||||
"checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
|
||||
"checksum tinytemplate 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "57a3c6667d3e65eb1bc3aed6fd14011c6cbc3a0665218ab7f5daf040b9ec371a"
|
||||
"checksum unicode-segmentation 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0"
|
||||
"checksum unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
|
||||
"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
|
||||
"checksum version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
|
||||
"checksum walkdir 2.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "777182bc735b6424e1a57516d35ed72cb8019d85c8c9bf536dccb3445c1a2f7d"
|
||||
"checksum wasm-bindgen 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)" = "5205e9afdf42282b192e2310a5b463a6d1c1d774e30dc3c791ac37ab42d2616c"
|
||||
"checksum wasm-bindgen-backend 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)" = "11cdb95816290b525b32587d76419facd99662a07e59d3cdb560488a819d9a45"
|
||||
"checksum wasm-bindgen-macro 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)" = "574094772ce6921576fb6f2e3f7497b8a76273b6db092be18fc48a082de09dc3"
|
||||
"checksum wasm-bindgen-macro-support 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)" = "e85031354f25eaebe78bb7db1c3d86140312a911a106b2e29f9cc440ce3e7668"
|
||||
"checksum wasm-bindgen-shared 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)" = "f5e7e61fc929f4c0dddb748b102ebf9f632e2b8d739f2016542b4de2965a9601"
|
||||
"checksum wasm-bindgen-webidl 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)" = "ef012a0d93fc0432df126a8eaf547b2dce25a8ce9212e1d3cbeef5c11157975d"
|
||||
"checksum web-sys 0.3.35 (registry+https://github.com/rust-lang/crates.io-index)" = "aaf97caf6aa8c2b1dac90faf0db529d9d63c93846cca4911856f78a83cebf53b"
|
||||
"checksum weedle 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3bb43f70885151e629e2a19ce9e50bd730fd436cfd4b666894c9ce4de9141164"
|
||||
"checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
|
||||
"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
"checksum winapi-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "4ccfbf554c6ad11084fb7517daca16cfdcaccbdadba4fc336f032a8b12c2ad80"
|
||||
"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
@ -8,14 +8,7 @@ edition = "2018"
|
||||
|
||||
[dependencies]
|
||||
|
||||
[dev-dependencies]
|
||||
criterion = "0.3"
|
||||
|
||||
[features]
|
||||
default = ["std"]
|
||||
alloc = []
|
||||
std = ["alloc"]
|
||||
|
||||
[[bench]]
|
||||
name = "stock_functions"
|
||||
harness = false
|
||||
|
||||
@ -1,110 +0,0 @@
|
||||
use criterion::{criterion_group, criterion_main};
|
||||
#[cfg(not(tarpaulin_include))]
|
||||
mod sf {
|
||||
use criterion::{black_box, BenchmarkId, Criterion};
|
||||
use rusty_numbers::num::Unsigned;
|
||||
use rusty_numbers::{factorial, fibonacci, it_factorial, mem_fibonacci, rec_fibonacci};
|
||||
|
||||
pub fn bench_factorial(c: &mut Criterion) {
|
||||
let mut group = c.benchmark_group("Factorials");
|
||||
|
||||
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(black_box(*i)))
|
||||
});
|
||||
group.bench_with_input(BenchmarkId::new("Iterative", i), i, |b, i| {
|
||||
b.iter(|| it_factorial(black_box(*i)))
|
||||
});
|
||||
}
|
||||
group.finish();
|
||||
}
|
||||
|
||||
pub fn bench_fibonacci(c: &mut Criterion) {
|
||||
let mut group = c.benchmark_group("Fibonacci");
|
||||
|
||||
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(black_box(*i)))
|
||||
});
|
||||
group.bench_with_input(BenchmarkId::new("Iterative", i), i, |b, i| {
|
||||
b.iter(|| fibonacci(black_box(*i)))
|
||||
});
|
||||
}
|
||||
|
||||
group.finish();
|
||||
|
||||
let mut group = c.benchmark_group("Recursive Fibonacci");
|
||||
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(black_box(*i)))
|
||||
});
|
||||
}
|
||||
group.finish();
|
||||
}
|
||||
|
||||
pub fn bench_gcd(c: &mut Criterion) {
|
||||
let mut group = c.benchmark_group("GCD");
|
||||
|
||||
#[derive(Debug)]
|
||||
struct Gcd {
|
||||
left: u128,
|
||||
right: u128,
|
||||
left_fib: u128,
|
||||
right_fib: u128,
|
||||
}
|
||||
|
||||
impl Gcd {
|
||||
fn new(left: u128, right: u128) -> Self {
|
||||
Gcd {
|
||||
left,
|
||||
right,
|
||||
left_fib: fibonacci(left as usize).unwrap(),
|
||||
right_fib: fibonacci(right as usize).unwrap(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let max = Gcd::new(185, 186);
|
||||
let med = Gcd::new(92, 93);
|
||||
let small = Gcd::new(14, 15);
|
||||
|
||||
for input in [small, med, max].iter() {
|
||||
group.bench_with_input(
|
||||
BenchmarkId::new("Binary", input.left),
|
||||
input,
|
||||
|bench, input| {
|
||||
let a = input.left_fib;
|
||||
let b = input.right_fib;
|
||||
bench.iter(|| u128::gcd(black_box(a), black_box(b)))
|
||||
},
|
||||
);
|
||||
group.bench_with_input(
|
||||
BenchmarkId::new("Stein", input.left),
|
||||
input,
|
||||
|bench, input| {
|
||||
let a = input.left_fib;
|
||||
let b = input.right_fib;
|
||||
bench.iter(|| u128::stein_gcd(black_box(a), black_box(b)))
|
||||
},
|
||||
);
|
||||
group.bench_with_input(
|
||||
BenchmarkId::new("Euclid", input.left),
|
||||
input,
|
||||
|bench, input| {
|
||||
let a = input.left_fib;
|
||||
let b = input.right_fib;
|
||||
bench.iter(|| u128::e_gcd(black_box(a), black_box(b)))
|
||||
},
|
||||
);
|
||||
}
|
||||
group.finish();
|
||||
}
|
||||
}
|
||||
|
||||
criterion_group!(
|
||||
benches,
|
||||
sf::bench_factorial,
|
||||
sf::bench_fibonacci,
|
||||
sf::bench_gcd
|
||||
);
|
||||
criterion_main!(benches);
|
||||
275
src/lib.rs
275
src/lib.rs
@ -12,282 +12,7 @@ extern crate alloc;
|
||||
#[macro_use]
|
||||
extern crate std;
|
||||
|
||||
#[cfg(feature = "std")]
|
||||
use core::f64::consts::{E, PI};
|
||||
|
||||
pub mod bigint;
|
||||
pub mod num;
|
||||
pub mod rational;
|
||||
|
||||
/// Calculate a number in the fibonacci sequence,
|
||||
/// using recursion and a lookup table
|
||||
///
|
||||
/// Can calculate up to 186 using native unsigned 128 bit integers.
|
||||
///
|
||||
/// Example:
|
||||
/// ```rust
|
||||
/// use rusty_numbers::mem_fibonacci;
|
||||
///
|
||||
/// let valid = mem_fibonacci(45); // Some(1134903170)
|
||||
/// # assert_eq!(1134903170, mem_fibonacci(45).unwrap());
|
||||
/// # assert!(valid.is_some());
|
||||
///
|
||||
/// let invalid = mem_fibonacci(187); // None
|
||||
/// # assert!(invalid.is_none());
|
||||
/// ```
|
||||
#[inline]
|
||||
pub fn mem_fibonacci(n: usize) -> Option<u128> {
|
||||
let mut table = [0u128; 187];
|
||||
table[0] = 0;
|
||||
table[1] = 1;
|
||||
table[2] = 1;
|
||||
|
||||
/// Actual calculating function for `fibonacci`
|
||||
fn f(n: usize, table: &mut [u128]) -> Option<u128> {
|
||||
if n < 2 {
|
||||
// The first values are predefined.
|
||||
return Some(table[n]);
|
||||
}
|
||||
|
||||
if n > 186 {
|
||||
return None;
|
||||
}
|
||||
|
||||
match table[n] {
|
||||
// The lookup array starts out zeroed, so a zero
|
||||
// is a not yet calculated value
|
||||
0 => {
|
||||
let a = f(n - 1, table)?;
|
||||
let b = f(n - 2, table)?;
|
||||
|
||||
table[n] = a + b;
|
||||
|
||||
Some(table[n])
|
||||
}
|
||||
x => Some(x),
|
||||
}
|
||||
}
|
||||
|
||||
f(n, &mut table)
|
||||
}
|
||||
|
||||
/// Calculate a number in the fibonacci sequence,
|
||||
/// using naive recursion
|
||||
///
|
||||
/// REALLY SLOW
|
||||
///
|
||||
/// Can calculate up to 186 using native unsigned 128 bit integers.
|
||||
#[inline]
|
||||
pub fn rec_fibonacci(n: usize) -> Option<u128> {
|
||||
if matches!(n, 0 | 1) {
|
||||
Some(n as u128)
|
||||
} else {
|
||||
let a = rec_fibonacci(n - 1)?;
|
||||
let b = rec_fibonacci(n - 2)?;
|
||||
|
||||
a.checked_add(b)
|
||||
}
|
||||
}
|
||||
|
||||
/// Calculate a number in the fibonacci sequence,
|
||||
///
|
||||
/// Can calculate up to 186 using native unsigned 128 bit integers.
|
||||
///
|
||||
/// Example:
|
||||
/// ```rust
|
||||
/// use rusty_numbers::fibonacci;
|
||||
///
|
||||
/// let valid = fibonacci(45); // Some(1134903170)
|
||||
/// # assert_eq!(1134903170, fibonacci(45).unwrap());
|
||||
/// # assert!(valid.is_some());
|
||||
///
|
||||
/// let invalid = fibonacci(187); // None
|
||||
/// # assert!(invalid.is_none());
|
||||
/// ```
|
||||
#[inline]
|
||||
pub fn fibonacci(n: usize) -> Option<u128> {
|
||||
let mut a: u128 = 0;
|
||||
let mut b: u128 = 1;
|
||||
|
||||
if matches!(n, 0 | 1) {
|
||||
Some(n as u128)
|
||||
} else {
|
||||
for _ in 0..n - 1 {
|
||||
let c: u128 = a.checked_add(b)?;
|
||||
|
||||
a = b;
|
||||
b = c;
|
||||
}
|
||||
|
||||
Some(b)
|
||||
}
|
||||
}
|
||||
|
||||
/// Calculate the value of a factorial iteratively
|
||||
///
|
||||
/// Can calculate up to 34! using native unsigned 128 bit integers.
|
||||
///
|
||||
/// Example:
|
||||
/// ```rust
|
||||
/// use rusty_numbers::factorial;
|
||||
///
|
||||
/// let valid = factorial(3); // Some(6)
|
||||
/// # assert_eq!(6, valid.unwrap());
|
||||
///
|
||||
/// let invalid = factorial(35); // None
|
||||
/// # assert!(invalid.is_none());
|
||||
/// ```
|
||||
#[inline]
|
||||
pub fn it_factorial(n: usize) -> Option<u128> {
|
||||
let mut total: u128 = 1;
|
||||
|
||||
if matches!(n, 0 | 1) {
|
||||
Some(1u128)
|
||||
} else {
|
||||
for x in 1..=n {
|
||||
total = total.checked_mul(x as u128)?;
|
||||
}
|
||||
|
||||
Some(total)
|
||||
}
|
||||
}
|
||||
|
||||
/// Calculate the value of a factorial recrursively
|
||||
///
|
||||
/// Can calculate up to 34! using native unsigned 128 bit integers.
|
||||
///
|
||||
/// Example:
|
||||
/// ```rust
|
||||
/// use rusty_numbers::factorial;
|
||||
///
|
||||
/// let valid = factorial(3); // Some(6)
|
||||
/// # assert_eq!(6, valid.unwrap());
|
||||
///
|
||||
/// let invalid = factorial(35); // None
|
||||
/// # assert!(invalid.is_none());
|
||||
/// ```
|
||||
#[inline]
|
||||
pub fn factorial(n: usize) -> Option<u128> {
|
||||
if matches!(n, 0 | 1) {
|
||||
Some(1u128)
|
||||
} else {
|
||||
let prev = factorial(n - 1)?;
|
||||
|
||||
(n as u128).checked_mul(prev)
|
||||
}
|
||||
}
|
||||
|
||||
/// Approximates a factorial using Stirling's approximation
|
||||
///
|
||||
/// Based on https://en.wikipedia.org/wiki/Stirling's_approximation
|
||||
///
|
||||
/// Can approximate up to ~ 170.624!
|
||||
///
|
||||
/// Example:
|
||||
/// ```rust
|
||||
/// use rusty_numbers::approx_factorial;
|
||||
///
|
||||
/// let valid = approx_factorial(170.6); // Some(..)
|
||||
/// # assert!(valid.is_some());
|
||||
///
|
||||
/// let invalid = approx_factorial(171.0); // None
|
||||
/// # assert!(invalid.is_none());
|
||||
/// ```
|
||||
#[cfg(feature = "std")]
|
||||
#[inline]
|
||||
pub fn approx_factorial(n: f64) -> Option<f64> {
|
||||
let power = (n / E).powf(n);
|
||||
let root = (PI * 2.0 * n).sqrt();
|
||||
|
||||
let res = power * root;
|
||||
|
||||
if res >= core::f64::MIN && res <= core::f64::MAX {
|
||||
Some(res)
|
||||
} else {
|
||||
None
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
#[cfg(not(tarpaulin_include))]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_factorial() {
|
||||
for pair in [[1usize, 0], [1, 1], [2, 2], [6, 3]].iter() {
|
||||
assert_eq!(
|
||||
Some(pair[0] as u128),
|
||||
factorial(pair[1]),
|
||||
"{}! should be {}",
|
||||
pair[1],
|
||||
pair[0]
|
||||
);
|
||||
assert_eq!(
|
||||
Some(pair[0] as u128),
|
||||
it_factorial(pair[1]),
|
||||
"{}! should be {}",
|
||||
pair[1],
|
||||
pair[0]
|
||||
);
|
||||
}
|
||||
|
||||
// Verify each implementation returns the same results
|
||||
let res = factorial(34);
|
||||
let res2 = it_factorial(34);
|
||||
assert!(res.is_some());
|
||||
assert!(res2.is_some());
|
||||
assert_eq!(res, res2);
|
||||
|
||||
// Bounds checks
|
||||
assert!(factorial(35).is_none());
|
||||
assert!(it_factorial(35).is_none());
|
||||
}
|
||||
|
||||
#[cfg(feature = "std")]
|
||||
#[test]
|
||||
fn test_approx_factorial() {
|
||||
assert!(approx_factorial(170.624).is_some());
|
||||
assert!(approx_factorial(1.0).is_some());
|
||||
assert!(approx_factorial(170.7).is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_fibonacci() {
|
||||
// Sanity checking
|
||||
for pair in [[0usize, 0], [1, 1], [1, 2], [2, 3]].iter() {
|
||||
assert_eq!(
|
||||
Some(pair[0] as u128),
|
||||
fibonacci(pair[1]),
|
||||
"fibonacci({}) should be {}",
|
||||
pair[1],
|
||||
pair[0]
|
||||
);
|
||||
assert_eq!(
|
||||
Some(pair[0] as u128),
|
||||
mem_fibonacci(pair[1]),
|
||||
"fibonacci({}) should be {}",
|
||||
pair[1],
|
||||
pair[0]
|
||||
);
|
||||
assert_eq!(
|
||||
Some(pair[0] as u128),
|
||||
rec_fibonacci(pair[1]),
|
||||
"fibonacci({}) should be {}",
|
||||
pair[1],
|
||||
pair[0]
|
||||
);
|
||||
}
|
||||
|
||||
// Verify each implementation returns the same results
|
||||
let res = fibonacci(186);
|
||||
let res2 = mem_fibonacci(186);
|
||||
assert!(res.is_some());
|
||||
assert!(res2.is_some());
|
||||
assert_eq!(res, res2);
|
||||
|
||||
// Bounds checks
|
||||
assert!(fibonacci(187).is_none());
|
||||
assert!(mem_fibonacci(187).is_none());
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user