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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| use std::{fmt::Write, str, time::Duration}; | ||
|
|
||
| use bevy_reflect::ParsedPath; | ||
| use criterion::{ | ||
| black_box, criterion_group, criterion_main, BatchSize, BenchmarkId, Criterion, Throughput, | ||
| }; | ||
| use rand::{distributions::Uniform, Rng, SeedableRng}; | ||
| use rand_chacha::ChaCha8Rng; | ||
|
|
||
| criterion_group!(benches, parse_reflect_path); | ||
| criterion_main!(benches); | ||
|
|
||
| const WARM_UP_TIME: Duration = Duration::from_millis(500); | ||
| const MEASUREMENT_TIME: Duration = Duration::from_secs(2); | ||
| const SAMPLE_SIZE: usize = 500; | ||
| const NOISE_THRESHOLD: f64 = 0.03; | ||
| const SIZES: [usize; 6] = [100, 3160, 1000, 3_162, 10_000, 24_000]; | ||
|
|
||
| fn deterministic_rand() -> ChaCha8Rng { | ||
| ChaCha8Rng::seed_from_u64(42) | ||
| } | ||
| fn random_ident(rng: &mut ChaCha8Rng, f: &mut dyn Write) { | ||
| let between = Uniform::try_from(b'a'..=b'z').unwrap(); | ||
| let ident_size = rng.gen_range(1..128); | ||
| let ident: Vec<u8> = rng.sample_iter(between).take(ident_size).collect(); | ||
| let ident = str::from_utf8(&ident).unwrap(); | ||
| let _ = write!(f, "{ident}"); | ||
| } | ||
|
|
||
| fn random_index(rng: &mut ChaCha8Rng, f: &mut dyn Write) { | ||
| let index = rng.gen_range(1..128); | ||
| let _ = write!(f, "{index}"); | ||
| } | ||
|
|
||
| fn write_random_access(rng: &mut ChaCha8Rng, f: &mut dyn Write) { | ||
| match rng.gen_range(0..4) { | ||
| 0 => { | ||
| // Access::Field | ||
| f.write_char('.').unwrap(); | ||
| random_ident(rng, f); | ||
| } | ||
| 1 => { | ||
| // Access::FieldIndex | ||
| f.write_char('#').unwrap(); | ||
| random_index(rng, f); | ||
| } | ||
| 2 => { | ||
| // Access::Index | ||
| f.write_char('[').unwrap(); | ||
| random_index(rng, f); | ||
| f.write_char(']').unwrap(); | ||
| } | ||
| 3 => { | ||
| // Access::TupleIndex | ||
| f.write_char('.').unwrap(); | ||
| random_index(rng, f); | ||
| } | ||
| _ => unreachable!(), | ||
| } | ||
| } | ||
|
|
||
| fn mk_paths(size: usize) -> impl FnMut() -> String { | ||
| let mut rng = deterministic_rand(); | ||
| move || { | ||
| let mut ret = String::new(); | ||
| (0..size).for_each(|_| write_random_access(&mut rng, &mut ret)); | ||
| ret | ||
| } | ||
| } | ||
|
|
||
| fn parse_reflect_path(criterion: &mut Criterion) { | ||
| let mut group = criterion.benchmark_group("parse_reflect_path"); | ||
| group.warm_up_time(WARM_UP_TIME); | ||
| group.measurement_time(MEASUREMENT_TIME); | ||
| group.sample_size(SAMPLE_SIZE); | ||
| group.noise_threshold(NOISE_THRESHOLD); | ||
| let group = &mut group; | ||
|
|
||
| for size in SIZES { | ||
| group.throughput(Throughput::Elements(size as u64)); | ||
| group.bench_with_input( | ||
| BenchmarkId::new("parse_reflect_path", size), | ||
| &size, | ||
| |bencher, &size| { | ||
| let mut mk_paths = mk_paths(size); | ||
| bencher.iter_batched( | ||
| || mk_paths(), | ||
| |path| assert!(ParsedPath::parse(black_box(&path)).is_ok()), | ||
| BatchSize::SmallInput, | ||
| ); | ||
| }, | ||
| ); | ||
| } | ||
| } |
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