concurrency benchmark

prometheus/benchmark_test.go

@@ -14,6 +14,7 @@
 package prometheus
 
 import (
+	"sync"
 	"testing"
 )
 
@@ -32,6 +33,29 @@ func BenchmarkCounterWithLabelValues(b *testing.B) {
 	}
 }
 
+func BenchmarkCounterWithLabelValuesConcurrent(b *testing.B) {
+	m := NewCounterVec(
+		CounterOpts{
+			Name: "benchmark_counter",
+			Help: "A counter to benchmark it.",
+		},
+		[]string{"one", "two", "three"},
+	)
+	b.ReportAllocs()
+	b.ResetTimer()
+	wg := sync.WaitGroup{}
+	for i := 0; i < 10; i++ {
+		wg.Add(1)
+		go func() {
+			for j := 0; j < b.N/10; j++ {
+				m.WithLabelValues("eins", "zwei", "drei").Inc()
+			}
+			wg.Done()
+		}()
+	}
+	wg.Wait()
+}
+
 func BenchmarkCounterWithMappedLabels(b *testing.B) {
 	m := NewCounterVec(
 		CounterOpts{