benches: add baseline cases (#185)

Signed-off-by: MOZGIII <mike-n@narod.ru>

Cargo.toml

@@ -40,6 +40,10 @@ hyper = { version = "0.14.16", features = ["server", "http1", "tcp"] }
 [build-dependencies]
 prost-build = { version = "0.11.0", optional = true }
 
+[[bench]]
+name = "baseline"
+harness = false
+
 [[bench]]
 name = "family"
 harness = false
@@ -54,4 +58,4 @@ required-features = []
 name = "proto"
 path = "benches/encoding/proto.rs"
 harness = false
-required-features = ["protobuf"] 
+required-features = ["protobuf"]

benches/baseline.rs

@@ -0,0 +1,24 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+use prometheus_client::metrics::counter::Counter;
+use prometheus_client::metrics::family::Family;
+
+pub fn baseline(c: &mut Criterion) {
+    c.bench_function("counter", |b| {
+        let counter: Counter = Counter::default();
+
+        b.iter(|| {
+            counter.inc();
+        })
+    });
+
+    c.bench_function("counter via family lookup", |b| {
+        let family = Family::<(), Counter>::default();
+
+        b.iter(|| {
+            family.get_or_create(&()).inc();
+        })
+    });
+}
+
+criterion_group!(benches, baseline);
+criterion_main!(benches);

benches/family.rs

@@ -3,6 +3,32 @@ use prometheus_client::metrics::counter::Counter;
 use prometheus_client::metrics::family::Family;
 
 pub fn family(c: &mut Criterion) {
+    c.bench_function(
+        "counter family with [(&'static str, &'static str)] label set",
+        |b| {
+            let family = Family::<[(&'static str, &'static str); 2], Counter>::default();
+
+            b.iter(|| {
+                family
+                    .get_or_create(&[("method", "GET"), ("status", "200")])
+                    .inc();
+            })
+        },
+    );
+
+    c.bench_function(
+        "counter family with Vec<(&'static str, &'static str)> label set",
+        |b| {
+            let family = Family::<Vec<(&'static str, &'static str)>, Counter>::default();
+
+            b.iter(|| {
+                family
+                    .get_or_create(&vec![("method", "GET"), ("status", "200")])
+                    .inc();
+            })
+        },
+    );
+
     c.bench_function("counter family with Vec<(String, String)> label set", |b| {
         let family = Family::<Vec<(String, String)>, Counter>::default();