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Add benchmark for query with many tracked structs
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Original file line number | Diff line number | Diff line change |
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use criterion::{criterion_group, criterion_main, BatchSize, Criterion}; | ||
use salsa::Setter; | ||
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#[salsa::input] | ||
struct Input { | ||
field: usize, | ||
} | ||
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#[salsa::tracked] | ||
struct Tracked<'db> { | ||
number: usize, | ||
} | ||
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#[salsa::tracked(return_ref)] | ||
fn index<'db>(db: &'db dyn salsa::Database, input: Input) -> Vec<Tracked<'db>> { | ||
(0..input.field(db)).map(|i| Tracked::new(db, i)).collect() | ||
} | ||
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#[salsa::tracked] | ||
fn root(db: &dyn salsa::Database, input: Input) -> usize { | ||
let index = index(db, input); | ||
index.len() | ||
} | ||
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fn many_tracked_structs(criterion: &mut Criterion) { | ||
criterion.bench_function("many_tracked_structs", |b| { | ||
b.iter_batched_ref( | ||
|| { | ||
let db = salsa::default_database(); | ||
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let input = Input::new(&db, 10_000); | ||
let input2 = Input::new(&db, 1); | ||
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// prewarm cache | ||
let _ = root(&db, input); | ||
let _ = root(&db, input2); | ||
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(db, input, input2) | ||
}, | ||
|(db, input, input2)| { | ||
// Make a change, but fetch the result for the other input | ||
input2.set_field(db).to(2); | ||
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let result = root(db, *input); | ||
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assert_eq!(result, 10_000); | ||
}, | ||
BatchSize::LargeInput, | ||
); | ||
}); | ||
} | ||
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criterion_group!(benches, many_tracked_structs); | ||
criterion_main!(benches); |