Adding noop metrics benchmark (#1607)

opentelemetry/Cargo.toml

@@ -42,3 +42,9 @@ otel_unstable = []
 
 [dev-dependencies]
 opentelemetry_sdk = { path = "../opentelemetry-sdk" } # for documentation tests
+criterion = { version = "0.4", features = ["html_reports"] }
+
+[[bench]]
+name = "noop_metrics"
+harness = false
+required-features = ["metrics"]

opentelemetry/benches/noop_metrics.rs

@@ -0,0 +1,94 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+use opentelemetry::{
+    metrics::{noop::NoopMeterProvider, Counter, MeterProvider as _},
+    KeyValue,
+};
+
+fn create_counter() -> Counter<u64> {
+    let meter_provider: NoopMeterProvider = NoopMeterProvider::default();
+    let meter = meter_provider.meter("benchmarks");
+    let counter = meter.u64_counter("counter_bench").init();
+    counter
+}
+
+fn criterion_benchmark(c: &mut Criterion) {
+    noop_counter_add(c);
+}
+
+fn noop_counter_add(c: &mut Criterion) {
+    let noop_counter = create_counter();
+
+    c.bench_function("NoopCounter_NoAttributes", |b| {
+        b.iter(|| {
+            noop_counter.add(1, &[]);
+        });
+    });
+
+    c.bench_function("NoopCounter_AddWithInlineStaticAttributes", |b| {
+        b.iter(|| {
+            noop_counter.add(
+                1,
+                &[
+                    KeyValue::new("attribute1", "value1"),
+                    KeyValue::new("attribute2", "value2"),
+                    KeyValue::new("attribute3", "value3"),
+                    KeyValue::new("attribute4", "value4"),
+                ],
+            );
+        });
+    });
+
+    c.bench_function("NoopCounter_AddWithStaticArray", |b| {
+        b.iter(|| {
+            let kv = [
+                KeyValue::new("attribute1", "value1"),
+                KeyValue::new("attribute2", "value2"),
+                KeyValue::new("attribute3", "value3"),
+                KeyValue::new("attribute4", "value4"),
+            ];
+
+            noop_counter.add(1, &kv);
+        });
+    });
+
+    c.bench_function("NoopCounter_AddWithDynamicAttributes", |b| {
+        b.iter(|| {
+            let kv = vec![
+                KeyValue::new("attribute1", "value1"),
+                KeyValue::new("attribute2", "value2"),
+                KeyValue::new("attribute3", "value3"),
+                KeyValue::new("attribute4", "value4"),
+            ];
+
+            noop_counter.add(1, &kv);
+        });
+    });
+
+    #[allow(clippy::useless_vec)]
+    c.bench_function("CreateVector_KeyValue", |b| {
+        b.iter(|| {
+            let _v1 = vec![
+                KeyValue::new("attribute1", "value1"),
+                KeyValue::new("attribute2", "value2"),
+                KeyValue::new("attribute3", "value3"),
+                KeyValue::new("attribute4", "value4"),
+            ];
+        });
+    });
+
+    #[allow(clippy::useless_vec)]
+    c.bench_function("CreateDynamicVector_StringPair", |b| {
+        b.iter(|| {
+            let _v1 = vec![
+                ("attribute1", "value1"),
+                ("attribute2", "value2"),
+                ("attribute3", "value3"),
+                ("attribute4", "value4"),
+            ];
+        });
+    });
+}
+
+criterion_group!(benches, criterion_benchmark);
+
+criterion_main!(benches);