From 75fe940ffc9e6a314efd6324a8a34f30082d84dd Mon Sep 17 00:00:00 2001 From: Timothy Warren Date: Thu, 20 Feb 2020 17:13:46 -0500 Subject: [PATCH] Add benchmarks --- Cargo.lock | 655 +++++++++++++++++++++++++++++++++++++ Cargo.toml | 7 + Jenkinsfile | 60 ++-- benches/stock_functions.rs | 41 +++ src/lib.rs | 62 ++++ src/num.rs | 5 +- 6 files changed, 799 insertions(+), 31 deletions(-) create mode 100644 benches/stock_functions.rs diff --git a/Cargo.lock b/Cargo.lock index 697e6be..cbff0dc 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -1,6 +1,661 @@ # This file is automatically @generated by Cargo. # It is not intended for manual editing. +[[package]] +name = "anyhow" +version = "1.0.26" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "atty" +version = "0.2.14" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "hermit-abi 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.66 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a/Cargo.toml +++ b/Cargo.toml @@ -7,3 +7,10 @@ edition = "2018" # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html [dependencies] + +[dev-dependencies] +criterion = "0.3" + +[[bench]] +name = "stock_functions" +harness = false diff --git a/Jenkinsfile b/Jenkinsfile index 283ce81..5669db7 100644 --- a/Jenkinsfile +++ b/Jenkinsfile @@ -1,31 +1,31 @@ pipeline { - agent { - docker { - image 'rust:latest' - args '-u root --privileged' - } - } - stages { - stage('Check') { - steps { - sh "cargo check" - } - } - stage('Test') { - steps { - sh "cargo test" - } - } - stage('Coverage') { - steps { - sh "cargo install cargo-tarpaulin" - sh "make generate-coverage" - } - } - } - post { - always { - cobertura coberturaReportFile: 'cobertura.xml' - } - } -} \ No newline at end of file + agent { + docker { + image 'rust:latest' + args '-u root --privileged' + } + } + stages { + stage('Check') { + steps { + sh "cargo check" + } + } + stage('Test') { + steps { + sh "cargo test" + } + } + stage('Coverage') { + steps { + sh "cargo install cargo-tarpaulin" + sh "make generate-coverage" + } + } + } + post { + always { + cobertura coberturaReportFile: 'cobertura.xml' + } + } + } \ No newline at end of file diff --git a/benches/stock_functions.rs b/benches/stock_functions.rs new file mode 100644 index 0000000..a6d3b2e --- /dev/null +++ b/benches/stock_functions.rs @@ -0,0 +1,41 @@ +use criterion::{black_box, criterion_group, criterion_main, Criterion}; +use rusty_numbers::{factorial, fibonacci, rec_factorial, rec_fibonacci}; + +fn bench_factorial(c: &mut Criterion) { + let mut group = c.benchmark_group("Factorials"); + + // Recursive with lookup table + group.bench_function("factorial", |b| b.iter(|| factorial(34))); + group.bench_function("factorial black box", |b| { + b.iter(|| factorial(black_box(34))) + }); + + // Naive recursive + group.bench_function("rec_factorial", |b| b.iter(|| rec_factorial(34))); + group.bench_function("rec_factorial black box", |b| { + b.iter(|| rec_factorial(black_box(34))) + }); + + group.finish(); +} + +fn bench_fibonacci(c: &mut Criterion) { + let mut group = c.benchmark_group("Fibonacci"); + + // Recursive with lookup table + group.bench_function("fibonacci", |b| b.iter(|| fibonacci(86))); + group.bench_function("fibonacci black box", |b| { + b.iter(|| fibonacci(black_box(86))) + }); + + // Naive recursive + group.bench_function("rec_fibonacci", |b| b.iter(|| rec_fibonacci(86))); + group.bench_function("rec_fibonacci black box", |b| { + b.iter(|| rec_fibonacci(black_box(86))) + }); + + group.finish(); +} + +criterion_group!(benches, bench_factorial, bench_fibonacci); +criterion_main!(benches); diff --git a/src/lib.rs b/src/lib.rs index 15d68b3..51cab33 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -24,6 +24,7 @@ pub mod rational; /// let invalid = fibonacci(187); // None /// # assert!(invalid.is_none()); /// ``` +#[inline] pub fn fibonacci(n: usize) -> Option { let mut table: Vec = vec![0, 1, 1, 2, 3, 5]; @@ -51,6 +52,45 @@ fn _fibonacci(n: usize, table: &mut Vec) -> Option { } } +/// Calculate a number in the fibonacci sequence, +/// using naive recursion +/// +/// Can calculate up to 186 using native unsigned 128 bit integers. +#[inline] +pub fn rec_fibonacci(n: usize) -> Option { + match n { + 0 => Some(0), + 1 => Some(1), + n => { + let a = rec_fibonacci(n - 1)?; + let b = rec_fibonacci(n - 2)?; + + a.checked_add(b) + }, + } +} + +#[inline] +pub fn it_fibonacci(n: usize) -> Option { + let mut a:u128 = 0; + let mut b:u128 = 1; + + match n { + 0 => Some(a), + 1 => Some(b), + _ => { + for _ in 0..n-1 { + let c: u128 = a.checked_add(b)?; + + a = b; + b = c; + } + + Some(b) + } + } +} + /// Calculate the value of a factorial, /// using a lookup table for better worst-case performance. /// @@ -66,6 +106,7 @@ fn _fibonacci(n: usize, table: &mut Vec) -> Option { /// let invalid = factorial(35); // None /// # assert!(invalid.is_none()); /// ``` +#[inline] pub fn factorial(n: usize) -> Option { let mut table: Vec = vec![1, 1, 2]; @@ -99,6 +140,22 @@ fn _factorial(n: usize, table: &mut Vec) -> Option { } } +/// Calculate the value of a factorial using recursion +/// +/// Can calculate up to 34! using native unsigned 128 bit integers. +#[inline] +pub fn rec_factorial(n: usize) -> Option { + match n { + 0 => Some(1u128), + 1 => Some(1u128), + _ => { + let prev = rec_factorial(n - 1)?; + + (n as u128).checked_mul(prev) + } + } +} + #[cfg(test)] #[cfg_attr(tarpaulin, skip)] mod tests { @@ -111,7 +168,9 @@ mod tests { assert_eq!(6, factorial(3).unwrap()); let res = factorial(34); + let res2 = rec_factorial(34); assert!(res.is_some()); + assert_eq!(res.unwrap(), res2.unwrap()); let res = factorial(35); assert!(res.is_none()); @@ -124,7 +183,10 @@ mod tests { assert_eq!(1, fibonacci(2).unwrap()); let res = fibonacci(186); + let res2 = it_fibonacci(186); assert!(res.is_some()); + assert!(res2.is_some()); + assert_eq!(res.unwrap(), res2.unwrap()); let res = fibonacci(187); assert!(res.is_none()); diff --git a/src/num.rs b/src/num.rs index d3e72e4..e28d0ed 100644 --- a/src/num.rs +++ b/src/num.rs @@ -217,7 +217,10 @@ macro_rules! impl_unsigned { }; } -impl_empty!(Num, (i8, u8, i16, u16, i32, u32, i64, u64, i128, u128, isize, usize)); +impl_empty!( + Num, + (i8, u8, i16, u16, i32, u32, i64, u64, i128, u128, isize, usize) +); impl_int!( (i8, u8), (u8, u8),