added bench

Cargo.toml

@@ -12,3 +12,10 @@ time = { version = "0.3.31", features = ["macros"] }
 tracing = "0.1.40"
 tracing-appender = "0.2.3"
 tracing-subscriber = { version = "0.3.18", features = ["time"] }
+
+[dev-dependencies]
+criterion = "0.3"
+
+[[bench]]
+name = "my_bench"
+harness = false

benches/my_bench.rs

@@ -0,0 +1,16 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+
+use rolling_file::default;
+use tracing::{debug, trace};
+
+fn do_log() {
+    trace!("trace");
+    debug!("debug");
+}
+fn criterion_benchmark(c: &mut Criterion) {
+    let _guard = default();
+    c.bench_function("log", |b| b.iter(|| do_log()));
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);