Import crate tracing am: 5500e2cb84 am: 4f725c2903 am: 76d353d71d

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tracing/+/2506378

Change-Id: I97d81aa4dcaa40faa0372a5e1b41a0ab841b17ac
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/benches/span_repeated.rs b/benches/span_repeated.rs
new file mode 100644
index 0000000..4c6ac40
--- /dev/null
+++ b/benches/span_repeated.rs
@@ -0,0 +1,20 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use tracing::{span, Level};
+
+mod shared;
+
+fn bench(c: &mut Criterion) {
+    shared::for_all_recording(&mut c.benchmark_group("span_repeated"), |b| {
+        let n = black_box(N_SPANS);
+        b.iter(|| (0..n).fold(mk_span(0), |_, i| mk_span(i as u64)))
+    });
+}
+
+#[inline]
+fn mk_span(i: u64) -> tracing::Span {
+    span!(Level::TRACE, "span", i = i)
+}
+
+const N_SPANS: usize = 100;
+criterion_group!(benches, bench);
+criterion_main!(benches);