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"registry+https://github.com/rust-lang/crates.io-index" +checksum = "4122cd3169e94605190e77839c9a40d40ed048d305bfdc146e7df40ab0f3e517" +dependencies = [ + "proc-macro2", + "quote", + "syn", +] + +[[package]] +name = "zmij" +version = "1.0.19" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "3ff05f8caa9038894637571ae6b9e29466c1f4f829d26c9b28f869a29cbe3445" diff --git a/Cargo.toml b/Cargo.toml index 95a6415..0336360 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -5,3 +5,11 @@ edition = "2024" [dependencies] unicode-segmentation = "1.12.0" + +[dev-dependencies] +criterion = "0.8.2" +rand = "0.9.2" + +[[bench]] +name = "my_benchmark" +harness = false diff --git a/README.md b/README.md index fcece7e..e343e52 100644 --- a/README.md +++ b/README.md @@ -49,4 +49,31 @@ levenshtein_utf(a: &String, b: &String) -> i32 ```bash cargo test -``` \ No newline at end of file +``` + +## Performance + +**levenshtein()**: + +| Charset | Length | Time (µs) | +| --- | --- | --- | +| ASCII | 16 | 0.730 ±0.003 | +| ASCII | 64 | 7.540 ±0.03 | +| ASCII | 128 | 26.730 ±0.1 | +| ASCII | 256 | 98.987 ±0.3 | +| ASCII | 512 | 383.92 ±0.6 | +| ASCII | 1000 | 1414.7 ±3 | +| UTF8 | 16 | 2.007 ±0.01 | +| UTF8 | 64 | 21.510 ±0.1 | +| UTF8 | 128 | 80.166 ±0.2 | +| UTF8 | 256 | 305.23 ±2 | +| UTF8 | 512 | 1650.7 ±100 | +| UTF8 | 1000 | 31150 ±300 | + +* CPU: AMD Ryzen 7 6800H + +## Benchmarking + +```bash +cargo bench +``` diff --git a/benches/my_benchmark.rs b/benches/my_benchmark.rs new file mode 100644 index 0000000..73648a5 --- /dev/null +++ b/benches/my_benchmark.rs @@ -0,0 +1,83 @@ +use criterion::{criterion_group, criterion_main, BatchSize, Criterion}; +use rand; +use std::hint::black_box; +use string_distance; + +fn generate_random_string>( + length: usize, + rng: &mut R, + distribution: &D, +) -> String { + let mut s = String::with_capacity(length * 4); + for _ in 0..length { + s.push(rng.sample(distribution)); + } + return s; +} + +struct AlphanumericChar { + alnum: rand::distr::Alphanumeric, +} + +impl rand::distr::Distribution for AlphanumericChar { + fn sample(&self, rng: &mut R) -> char { + return char::from(self.alnum.sample(rng)); + } +} + +fn criterion_benchmark(c: &mut Criterion) { + let lengths = [16, 64, 128, 256, 512, 1000]; + + let ascii_chars = AlphanumericChar { + alnum: rand::distr::Alphanumeric, + }; + let utf8_chars = rand::distr::StandardUniform; + let mut rng = rand::rng(); + + for length in lengths { + c.bench_function( + &format!( + "levenshtein for {charset} strings of length {length}", + charset = "ASCII", + length = length + ), + |b| { + b.iter_batched( + || { + return ( + generate_random_string(length, &mut rng, &ascii_chars), + generate_random_string(length, &mut rng, &ascii_chars), + ); + }, + |v| string_distance::levenshtein(black_box(&v.0), black_box(&v.1)), + BatchSize::SmallInput, + ) + }, + ); + } + + for length in lengths { + c.bench_function( + &format!( + "levenshtein for {charset} strings of length {length}", + charset = "UTF8", + length = length + ), + |b| { + b.iter_batched( + || { + return ( + generate_random_string(length, &mut rng, &utf8_chars), + generate_random_string(length, &mut rng, &utf8_chars), + ); + }, + |v| string_distance::levenshtein(black_box(&v.0), black_box(&v.1)), + BatchSize::SmallInput, + ) + }, + ); + } +} + +criterion_group!(benches, criterion_benchmark); +criterion_main!(benches);