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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:06:31 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:06:31 +0000
commit2ff14448863ac1a1dd9533461708e29aae170c2d (patch)
tree85b9fea2bbfe3f06473cfa381eed11f273b57c5c /vendor/tracing/benches/empty_span.rs
parentAdding debian version 1.64.0+dfsg1-1. (diff)
downloadrustc-2ff14448863ac1a1dd9533461708e29aae170c2d.tar.xz
rustc-2ff14448863ac1a1dd9533461708e29aae170c2d.zip
Adding debian version 1.65.0+dfsg1-2.debian/1.65.0+dfsg1-2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/tracing/benches/empty_span.rs')
-rw-r--r--vendor/tracing/benches/empty_span.rs43
1 files changed, 43 insertions, 0 deletions
diff --git a/vendor/tracing/benches/empty_span.rs b/vendor/tracing/benches/empty_span.rs
new file mode 100644
index 000000000..fb38b08e1
--- /dev/null
+++ b/vendor/tracing/benches/empty_span.rs
@@ -0,0 +1,43 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+
+mod shared;
+
+fn bench(c: &mut Criterion) {
+ let mut group = c.benchmark_group("empty_span");
+ shared::for_all_dispatches(&mut group, |b| {
+ b.iter(|| {
+ let span = tracing::span::Span::none();
+ black_box(&span);
+ })
+ });
+ group.bench_function("baseline_struct", |b| {
+ b.iter(|| {
+ let span = FakeEmptySpan::new();
+ black_box(&span);
+ })
+ });
+}
+
+struct FakeEmptySpan {
+ inner: Option<(usize, std::sync::Arc<()>)>,
+ meta: Option<&'static ()>,
+}
+
+impl FakeEmptySpan {
+ fn new() -> Self {
+ Self {
+ inner: None,
+ meta: None,
+ }
+ }
+}
+
+impl Drop for FakeEmptySpan {
+ fn drop(&mut self) {
+ black_box(&self.inner);
+ black_box(&self.meta);
+ }
+}
+
+criterion_group!(benches, bench);
+criterion_main!(benches);