Benchmarks for AnyValue (#1901)

opentelemetry/Cargo.toml

@@ -52,3 +52,7 @@ required-features = ["metrics"]
 [[bench]]
 name = "attributes"
 harness = false
+
+[[bench]]
+name = "anyvalue"
+harness = false

opentelemetry/benches/anyvalue.rs

@@ -0,0 +1,44 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use opentelemetry::{logs::AnyValue, Value};
+
+// Run this benchmark with:
+// cargo bench --bench anyvalue
+// Results:
+// CreateOTelValueString 1-2 ns
+// CreateOTelAnyValueString 15 ns
+// CreateOTelValueInt 1-2 ns
+// CreateOTelAnyValueInt 15 ns
+
+fn criterion_benchmark(c: &mut Criterion) {
+    attributes_creation(c);
+}
+
+fn attributes_creation(c: &mut Criterion) {
+    c.bench_function("CreateOTelValueString", |b| {
+        b.iter(|| {
+            let _v = black_box(Value::String("value1".into()));
+        });
+    });
+
+    c.bench_function("CreateOTelAnyValueString", |b| {
+        b.iter(|| {
+            let _v = black_box(AnyValue::String("value1".into()));
+        });
+    });
+
+    c.bench_function("CreateOTelValueInt", |b| {
+        b.iter(|| {
+            let _v = black_box(Value::I64(123));
+        });
+    });
+
+    c.bench_function("CreateOTelAnyValueInt", |b| {
+        b.iter(|| {
+            let _v = black_box(AnyValue::Int(123));
+        });
+    });
+}
+
+criterion_group!(benches, criterion_benchmark);
+
+criterion_main!(benches);