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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:03:36 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:03:36 +0000 |
commit | 17d40c6057c88f4c432b0d7bac88e1b84cb7e67f (patch) | |
tree | 3f66c4a5918660bb8a758ab6cda5ff8ee4f6cdcd /vendor/tracing/benches/global_subscriber.rs | |
parent | Adding upstream version 1.64.0+dfsg1. (diff) | |
download | rustc-17d40c6057c88f4c432b0d7bac88e1b84cb7e67f.tar.xz rustc-17d40c6057c88f4c432b0d7bac88e1b84cb7e67f.zip |
Adding upstream version 1.65.0+dfsg1.upstream/1.65.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | vendor/tracing/benches/global_subscriber.rs | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/vendor/tracing/benches/global_subscriber.rs b/vendor/tracing/benches/global_subscriber.rs deleted file mode 100644 index 83519610a..000000000 --- a/vendor/tracing/benches/global_subscriber.rs +++ /dev/null @@ -1,136 +0,0 @@ -use std::fmt::Write; - -use criterion::{black_box, criterion_group, criterion_main, Criterion}; -use tracing::Level; - -use tracing::{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; - } -} - -const NOP_LOGGER: NopLogger = NopLogger; - -struct NopLogger; - -impl log::Log for NopLogger { - fn enabled(&self, _metadata: &log::Metadata) -> bool { - true - } - - fn log(&self, record: &log::Record) { - if self.enabled(record.metadata()) { - let mut this = self; - let _ = write!(this, "{}", record.args()); - } - } - - fn flush(&self) {} -} - -impl Write for &NopLogger { - fn write_str(&mut self, s: &str) -> std::fmt::Result { - black_box(s); - Ok(()) - } -} - -const N_SPANS: usize = 100; - -fn criterion_benchmark(c: &mut Criterion) { - let mut c = c.benchmark_group("global/subscriber"); - let _ = tracing::subscriber::set_global_default(EnabledSubscriber); - let _ = log::set_logger(&NOP_LOGGER); - log::set_max_level(log::LevelFilter::Trace); - c.bench_function("span_no_fields", |b| b.iter(|| span!(Level::TRACE, "span"))); - - c.bench_function("event", |b| { - b.iter(|| { - tracing::event!(Level::TRACE, "hello"); - }) - }); - - c.bench_function("enter_span", |b| { - 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); - b.iter(|| (0..n).fold(mk_span(0), |_, i| mk_span(i as u64))) - }); - - c.bench_function("span_with_fields", |b| { - 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("global/dispatch"); - let _ = tracing::subscriber::set_global_default(EnabledSubscriber); - let _ = log::set_logger(&NOP_LOGGER); - log::set_max_level(log::LevelFilter::Trace); - group.bench_function("get_ref", |b| { - b.iter(|| { - tracing::dispatcher::get_default(|current| { - black_box(¤t); - }) - }) - }); - group.bench_function("get_clone", |b| { - 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); |