From 17d40c6057c88f4c432b0d7bac88e1b84cb7e67f Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:03:36 +0200 Subject: Adding upstream version 1.65.0+dfsg1. Signed-off-by: Daniel Baumann --- vendor/tracing/benches/subscriber.rs | 189 ----------------------------------- 1 file changed, 189 deletions(-) delete mode 100644 vendor/tracing/benches/subscriber.rs (limited to 'vendor/tracing/benches/subscriber.rs') diff --git a/vendor/tracing/benches/subscriber.rs b/vendor/tracing/benches/subscriber.rs deleted file mode 100644 index c6418010f..000000000 --- a/vendor/tracing/benches/subscriber.rs +++ /dev/null @@ -1,189 +0,0 @@ -use criterion::{black_box, criterion_group, criterion_main, Criterion}; -use tracing::Level; - -use std::{ - fmt, - sync::{Mutex, MutexGuard}, -}; -use tracing::{field, span, Event, Id, Metadata}; - -/// A subscriber that is enabled but otherwise does nothing. -struct EnabledSubscriber; - -impl tracing::Subscriber for EnabledSubscriber { - fn new_span(&self, span: &span::Attributes<'_>) -> Id { - let _ = span; - Id::from_u64(0xDEAD_FACE) - } - - fn event(&self, event: &Event<'_>) { - let _ = event; - } - - fn record(&self, span: &Id, values: &span::Record<'_>) { - let _ = (span, values); - } - - fn record_follows_from(&self, span: &Id, follows: &Id) { - let _ = (span, follows); - } - - fn enabled(&self, metadata: &Metadata<'_>) -> bool { - let _ = metadata; - true - } - - fn enter(&self, span: &Id) { - let _ = span; - } - - fn exit(&self, span: &Id) { - let _ = span; - } -} - -/// Simulates a subscriber that records span data. -struct VisitingSubscriber(Mutex); - -struct Visitor<'a>(MutexGuard<'a, String>); - -impl<'a> field::Visit for Visitor<'a> { - fn record_debug(&mut self, _field: &field::Field, value: &dyn fmt::Debug) { - use std::fmt::Write; - let _ = write!(&mut *self.0, "{:?}", value); - } -} - -impl tracing::Subscriber for VisitingSubscriber { - fn new_span(&self, span: &span::Attributes<'_>) -> Id { - let mut visitor = Visitor(self.0.lock().unwrap()); - span.record(&mut visitor); - Id::from_u64(0xDEAD_FACE) - } - - fn record(&self, _span: &Id, values: &span::Record<'_>) { - let mut visitor = Visitor(self.0.lock().unwrap()); - values.record(&mut visitor); - } - - fn event(&self, event: &Event<'_>) { - let mut visitor = Visitor(self.0.lock().unwrap()); - event.record(&mut visitor); - } - - fn record_follows_from(&self, span: &Id, follows: &Id) { - let _ = (span, follows); - } - - fn enabled(&self, metadata: &Metadata<'_>) -> bool { - let _ = metadata; - true - } - - fn enter(&self, span: &Id) { - let _ = span; - } - - fn exit(&self, span: &Id) { - let _ = span; - } -} - -const N_SPANS: usize = 100; - -fn criterion_benchmark(c: &mut Criterion) { - c.bench_function("span_no_fields", |b| { - tracing::subscriber::with_default(EnabledSubscriber, || { - b.iter(|| span!(Level::TRACE, "span")) - }); - }); - - c.bench_function("enter_span", |b| { - tracing::subscriber::with_default(EnabledSubscriber, || { - let span = span!(Level::TRACE, "span"); - #[allow(clippy::unit_arg)] - b.iter(|| black_box(span.in_scope(|| {}))) - }); - }); - - c.bench_function("span_repeatedly", |b| { - #[inline] - fn mk_span(i: u64) -> tracing::Span { - span!(Level::TRACE, "span", i = i) - } - - let n = black_box(N_SPANS); - tracing::subscriber::with_default(EnabledSubscriber, || { - b.iter(|| (0..n).fold(mk_span(0), |_, i| mk_span(i as u64))) - }); - }); - - c.bench_function("span_with_fields", |b| { - tracing::subscriber::with_default(EnabledSubscriber, || { - b.iter(|| { - span!( - Level::TRACE, - "span", - foo = "foo", - bar = "bar", - baz = 3, - quuux = tracing::field::debug(0.99) - ) - }) - }); - }); - - c.bench_function("span_with_fields_record", |b| { - let subscriber = VisitingSubscriber(Mutex::new(String::from(""))); - tracing::subscriber::with_default(subscriber, || { - b.iter(|| { - span!( - Level::TRACE, - "span", - foo = "foo", - bar = "bar", - baz = 3, - quuux = tracing::field::debug(0.99) - ) - }) - }); - }); -} - -fn bench_dispatch(c: &mut Criterion) { - let mut group = c.benchmark_group("dispatch"); - group.bench_function("no_dispatch_get_ref", |b| { - b.iter(|| { - tracing::dispatcher::get_default(|current| { - black_box(¤t); - }) - }) - }); - group.bench_function("no_dispatch_get_clone", |b| { - b.iter(|| { - let current = tracing::dispatcher::get_default(|current| current.clone()); - black_box(current); - }) - }); - group.bench_function("get_ref", |b| { - tracing::subscriber::with_default(EnabledSubscriber, || { - b.iter(|| { - tracing::dispatcher::get_default(|current| { - black_box(¤t); - }) - }) - }) - }); - group.bench_function("get_clone", |b| { - tracing::subscriber::with_default(EnabledSubscriber, || { - b.iter(|| { - let current = tracing::dispatcher::get_default(|current| current.clone()); - black_box(current); - }) - }) - }); - group.finish(); -} - -criterion_group!(benches, criterion_benchmark, bench_dispatch); -criterion_main!(benches); -- cgit v1.2.3