arcweight 0.3.0

A high-performance, modular library for weighted finite state transducers with comprehensive examples and benchmarks
Documentation 
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use arcweight::prelude::*;
use criterion::{criterion_group, criterion_main, Criterion};
use std::hint::black_box;

pub fn create_large_fst(n: usize) -> VectorFst<TropicalWeight> {
    let mut fst = VectorFst::new();
    let mut states = Vec::new();

    for _ in 0..=n {
        states.push(fst.add_state());
    }

    fst.set_start(states[0]);
    fst.set_final(states[n], TropicalWeight::one());

    // Create a dense FST with many arcs
    for i in 0..n {
        for j in 1..=5 {
            fst.add_arc(
                states[i],
                Arc::new(
                    j as u32,
                    j as u32,
                    TropicalWeight::new(j as f32),
                    states[i + 1],
                ),
            );
        }
    }

    fst
}

pub fn bench_large_fst_creation(c: &mut Criterion) {
    let mut group = c.benchmark_group("large_fst_creation");
    group.measurement_time(std::time::Duration::from_secs(10));

    group.bench_function("10000_states", |b| {
        b.iter(|| {
            let fst = create_large_fst(10000);
            black_box(fst);
        })
    });

    group.bench_function("50000_states", |b| {
        b.iter(|| {
            let fst = create_large_fst(50000);
            black_box(fst);
        })
    });

    group.finish();
}

pub fn bench_fst_clone(c: &mut Criterion) {
    let mut group = c.benchmark_group("fst_clone");
    group.measurement_time(std::time::Duration::from_secs(10));

    let fst = create_large_fst(10000);

    group.bench_function("clone_10000_states", |b| {
        b.iter(|| {
            let cloned = black_box(&fst).clone();
            black_box(cloned);
        })
    });

    let fst = create_large_fst(50000);

    group.bench_function("clone_50000_states", |b| {
        b.iter(|| {
            let cloned = black_box(&fst).clone();
            black_box(cloned);
        })
    });

    group.finish();
}

pub fn bench_fst_clear(c: &mut Criterion) {
    let mut group = c.benchmark_group("fst_clear");
    group.measurement_time(std::time::Duration::from_secs(10));

    let mut fst = create_large_fst(10000);

    group.bench_function("clear_10000_states", |b| {
        b.iter(|| {
            fst.clear();
            black_box(&fst);
        })
    });

    let mut fst = create_large_fst(50000);

    group.bench_function("clear_50000_states", |b| {
        b.iter(|| {
            fst.clear();
            black_box(&fst);
        })
    });

    group.finish();
}

criterion_group!(
    benches,
    bench_large_fst_creation,
    bench_fst_clone,
    bench_fst_clear
);
criterion_main!(benches);