43 lines
925 B
Rust
43 lines
925 B
Rust
use criterion::{black_box, criterion_group, criterion_main, Criterion};
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mod shared;
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fn bench(c: &mut Criterion) {
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let mut group = c.benchmark_group("empty_span");
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shared::for_all_dispatches(&mut group, |b| {
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b.iter(|| {
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let span = tracing::span::Span::none();
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black_box(&span);
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})
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});
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group.bench_function("baseline_struct", |b| {
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b.iter(|| {
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let span = FakeEmptySpan::new();
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black_box(&span);
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})
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});
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}
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struct FakeEmptySpan {
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inner: Option<(usize, std::sync::Arc<()>)>,
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meta: Option<&'static ()>,
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}
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impl FakeEmptySpan {
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fn new() -> Self {
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Self {
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inner: None,
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meta: None,
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}
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}
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}
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impl Drop for FakeEmptySpan {
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fn drop(&mut self) {
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black_box(&self.inner);
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black_box(&self.meta);
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}
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}
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criterion_group!(benches, bench);
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criterion_main!(benches);
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